﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xsi:schemaLocation="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2019v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2020-11-15T07:58:46-06:00</ReturnTs>
    <TaxPeriodEndDt>2019-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1Txt>BDO USA LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>8401 GREENSBORO DRIVE 800</AddressLine1Txt>
        <CityNm>MCLEAN</CityNm>
        <StateAbbreviationCd>VA</StateAbbreviationCd>
        <ZIPCd>22102</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2019-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>131656610</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>American Physical Society</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% DARRYL CAMPBELL CONTROLLER</InCareOfNm>
      <BusinessNameControlTxt>AMER</BusinessNameControlTxt>
      <PhoneNum>3012093210</PhoneNum>
      <USAddress>
        <AddressLine1Txt>One Physics Ellipse</AddressLine1Txt>
        <CityNm>College Park</CityNm>
        <StateAbbreviationCd>MD</StateAbbreviationCd>
        <ZIPCd>207403844</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JANE H GOULD</PersonNm>
      <PersonTitleTxt>CFO</PersonTitleTxt>
      <PhoneNum>3012093210</PhoneNum>
      <SignatureDt>2020-11-14</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Marc Berger</PreparerPersonNm>
      <PTIN>P01871563</PTIN>
      <PhoneNum>7038930600</PhoneNum>
    </PreparerPersonGrp>
    <FilingSecurityInformation>
      <IPAddress>
        <IPv4AddressTxt>73.53.153.141</IPv4AddressTxt>
      </IPAddress>
      <FederalOriginalSubmissionId>54621820203205000004</FederalOriginalSubmissionId>
      <FederalOriginalSubmissionIdDt>2020-11-15</FederalOriginalSubmissionIdDt>
      <FilingLicenseTypeCd>P</FilingLicenseTypeCd>
      <AtSubmissionCreationDeviceId>F80C4C4CE64063363A32333BB37C43EAD2BBFD59</AtSubmissionCreationDeviceId>
      <AtSubmissionFilingDeviceId>F80C4C4CE64063363A32333BB37C43EAD2BBFD59</AtSubmissionFilingDeviceId>
    </FilingSecurityInformation>
    <TaxYr>2019</TaxYr>
    <BuildTS>2021-01-29 14:40:06Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="10">
    <IRS990 documentId="IRS990" referenceDocumentId="IRS990ScheduleO">
      <PrincipalOfficerNm>KATE P KIRBY</PrincipalOfficerNm>
      <USAddress>
        <AddressLine1Txt>One Physics Ellipse</AddressLine1Txt>
        <CityNm>College Park</CityNm>
        <StateAbbreviationCd>MD</StateAbbreviationCd>
        <ZIPCd>207403844</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>88558281</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>false</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>APS.ORG</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>1914</FormationYr>
      <LegalDomicileStateCd>DC</LegalDomicileStateCd>
      <ActivityOrMissionDesc>TO ADVANCE AND DIFFUSE THE KNOWLEDGE OF PHYSICS FOR THE BENEFIT OF HUMANITY, PROMOTE PHYSICS, AND SERVE THE BROADER PHYSICS COMMUNITY.</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>14</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>14</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>278</TotalEmployeeCnt>
      <TotalVolunteersCnt>2900</TotalVolunteersCnt>
      <TotalGrossUBIAmt>123351</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>29354</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>7553204</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>7939551</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>51606625</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>55927636</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>7680160</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>8860897</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>7148</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>40845</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>66847137</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>72768929</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>2440062</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>2800124</CYGrantsAndSimilarPaidAmt>
      <PYBenefitsPaidToMembersAmt>0</PYBenefitsPaidToMembersAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>28248758</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>31749055</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>864610</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>24978540</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>26511584</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>55667360</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>61060763</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>11179777</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>11708166</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>214341835</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>247696785</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>35004036</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>35521787</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>179337799</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>212174998</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>THE AMERICAN PHYSICAL SOCIETY IS AN EDUCATIONAL AND SCIENTIFIC ORGANIZATION WHOSE OBJECTIVE IS THE ADVANCEMENT AND DIFFUSION OF THE KNOWLEDGE OF PHYSICS. APS IS A MEMBERSHIP ASSOCIATION WHICH PUBLISHES PHYSICS JOURNALS, CONDUCTS SCIENTIFIC MEETINGS, AND ENGAGES IN EDUCATIONAL, PUBLIC AFFAIRS AND OUTREACH PROGRAMS.</MissionDesc>
      <SignificantNewProgramSrvcInd>false</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>false</SignificantChangeInd>
      <ExpenseAmt>31026549</ExpenseAmt>
      <RevenueAmt>45374766</RevenueAmt>
      <Desc>PHYSICS Research Programs: Research Publications</Desc>
      <ProgSrvcAccomActy2Grp>
        <ExpenseAmt>8167015</ExpenseAmt>
        <GrantAmt>70027</GrantAmt>
        <RevenueAmt>8975465</RevenueAmt>
        <Desc>Physics Research Programs: Scientific Meetings</Desc>
      </ProgSrvcAccomActy2Grp>
      <ProgSrvcAccomActy3Grp>
        <ExpenseAmt>7013909</ExpenseAmt>
        <GrantAmt>333066</GrantAmt>
        <RevenueAmt>4139601</RevenueAmt>
        <Desc>Physics Research Programs: Membership Operations</Desc>
      </ProgSrvcAccomActy3Grp>
      <ProgSrvcAccomActyOtherGrp>
        <Desc>Physics Research Programs: EDUCATION</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>8756234</ExpenseAmt>
        <GrantAmt>1553957</GrantAmt>
        <RevenueAmt>4191485</RevenueAmt>
        <Desc>AND OUTREACH (54,069 MEMBERS)</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>862741</ExpenseAmt>
        <GrantAmt>843074</GrantAmt>
        <Desc>Physics Research Programs: PRIZES AND AWARDS</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <TotalOtherProgSrvcExpenseAmt>9618975</TotalOtherProgSrvcExpenseAmt>
      <TotalOtherProgSrvcGrantAmt>2397031</TotalOtherProgSrvcGrantAmt>
      <TotalOtherProgSrvcRevenueAmt>4191485</TotalOtherProgSrvcRevenueAmt>
      <TotalProgramServiceExpensesAmt>55826448</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="IRS990ScheduleA">true</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="IRS990ScheduleB">true</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd referenceDocumentId="IRS990ScheduleC">false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd referenceDocumentId="IRS990ScheduleC">true</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd referenceDocumentId="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd referenceDocumentId="IRS990ScheduleD">false</DonorAdvisedFundInd>
      <ConservationEasementsInd referenceDocumentId="IRS990ScheduleD">false</ConservationEasementsInd>
      <CollectionsOfArtInd referenceDocumentId="IRS990ScheduleD">false</CollectionsOfArtInd>
      <CreditCounselingInd referenceDocumentId="IRS990ScheduleD">false</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd referenceDocumentId="IRS990ScheduleD">true</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="IRS990ScheduleD">true</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="IRS990ScheduleD">true</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd referenceDocumentId="IRS990ScheduleD">false</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd referenceDocumentId="IRS990ScheduleD">false</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="IRS990ScheduleD">true</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd referenceDocumentId="IRS990ScheduleD">true</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="IRS990ScheduleD">true</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd referenceDocumentId="IRS990ScheduleD">false</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <ForeignActivitiesInd referenceDocumentId="IRS990ScheduleF">true</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd referenceDocumentId="IRS990ScheduleF">true</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd referenceDocumentId="IRS990ScheduleF">true</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>false</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>false</FundraisingActivitiesInd>
      <GamingActivitiesInd>false</GamingActivitiesInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <GrantsToOrganizationsInd referenceDocumentId="IRS990ScheduleI">true</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd referenceDocumentId="IRS990ScheduleI">true</GrantsToIndividualsInd>
      <ScheduleJRequiredInd referenceDocumentId="IRS990ScheduleJ">true</ScheduleJRequiredInd>
      <TaxExemptBondsInd>false</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd>false</PYExcessBenefitTransInd>
      <LoanOutstandingInd>false</LoanOutstandingInd>
      <GrantToRelatedPersonInd>false</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>false</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd>false</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>false</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd referenceDocumentId="IRS990ScheduleM">true</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd referenceDocumentId="IRS990ScheduleM">false</DeductibleArtContributionInd>
      <TerminateOperationsInd>false</TerminateOperationsInd>
      <PartialLiquidationInd>false</PartialLiquidationInd>
      <DisregardedEntityInd>false</DisregardedEntityInd>
      <RelatedEntityInd>false</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <ActivitiesConductedPrtshpInd>false</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>true</ScheduleORequiredInd>
      <IRPDocumentCnt>212</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>true</BackupWthldComplianceInd>
      <EmployeeCnt>278</EmployeeCnt>
      <EmploymentTaxReturnsFiledInd>true</EmploymentTaxReturnsFiledInd>
      <UnrelatedBusIncmOverLimitInd>true</UnrelatedBusIncmOverLimitInd>
      <Form990TFiledInd>true</Form990TFiledInd>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>false</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>false</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>false</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>false</Form8282PropertyDisposedOfInd>
      <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
      <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
      <IndoorTanningServicesInd>false</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>false</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>14</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>14</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>false</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>false</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>false</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>false</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>true</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>true</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>false</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>true</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>true</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>false</OfficerMailingAddressInd>
      <LocalChaptersInd>true</LocalChaptersInd>
      <PoliciesReferenceChaptersInd>true</PoliciesReferenceChaptersInd>
      <Form990ProvidedToGvrnBodyInd>true</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>true</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>true</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>true</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>true</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>true</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>true</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>true</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>false</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>MD</StatesWhereCopyOfReturnIsFldCd>
      <StatesWhereCopyOfReturnIsFldCd>NY</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <PersonNm>DARRYL CAMPBELL CONTROLLER</PersonNm>
        <PhoneNum>3012093210</PhoneNum>
        <USAddress>
          <AddressLine1Txt>ONE PHYSICS ELLIPSE</AddressLine1Txt>
          <CityNm>College Park</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>207403844</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <InfoInScheduleOPartVIIInd>X</InfoInScheduleOPartVIIInd>
      <Form990PartVIISectionAGrp>
        <PersonNm>KATE P KIRBY</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>526415</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>48787</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL THOENNESSEN</PersonNm>
        <TitleTxt>EDITOR-IN-CHIEF</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>340554</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>48787</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MARK DOYLE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>278106</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>56583</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MARGARET BANDERA</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>286960</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>29820</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES TAYLOR</PersonNm>
        <TitleTxt>CHIEF OPERATING OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>273406</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>37888</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MATTHEW SALTER</PersonNm>
        <TitleTxt>PUBLISHER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>248046</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>53947</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>FRANCIS SLAKEY</PersonNm>
        <TitleTxt>CHIEF GOVERNMENT OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>238197</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>44702</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>THEODORE HODAPP</PersonNm>
        <TitleTxt>DIR of Project Development</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>223740</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>43591</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DANIEL KULP</PersonNm>
        <TitleTxt>ASSOCIATE EDITORIAL DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>204691</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>49496</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>AMY FLATTEN</PersonNm>
        <TitleTxt>DIR OF INTERNATIONAL AFFAIRS</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>211277</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>31576</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PAUL DLUG</PersonNm>
        <TitleTxt>DIR OF JOURNAL INFORMATION SVC</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>210216</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>31466</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Christine Giaccone</PersonNm>
        <TitleTxt>Director of Journal Operations</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>205788</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>20586</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JEANETTE RUSSO</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>116113</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>40998</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROGER FALCONE</PersonNm>
        <TitleTxt>PAST PRESIDENT</TitleTxt>
        <AverageHoursPerWeekRt>20.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DAVID GROSS</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PHILIP BUCKSBAUM</PersonNm>
        <TitleTxt>PRESIDENT-ELECT</TitleTxt>
        <AverageHoursPerWeekRt>5.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SYLVESTER JAMES GATES</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHoursPerWeekRt>5.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>James Hollenhorst</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHoursPerWeekRt>5.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>AKIF BALANTEKIN</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BEVERLY BERGER</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PUSHPALATHA BHAT</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>VIVIAN INCERA</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Andrea Liu</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Marta Losada</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN MARSTON</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN RUMBLE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>AHMADOU WAGUE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>4.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>3363509</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>538227</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>88</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>false</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>true</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>false</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>IENEGIZER APTARA LIMITED</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>13963 Collections Cntr Drive BOX 1</AddressLine1Txt>
            <CityNm>CHICAGO</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60693</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Publishing Services</ServicesDesc>
        <CompensationAmt>2181679</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>Lumina Datamatics Inc</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>DEPT CH 16508</AddressLine1Txt>
            <CityNm>PALATINE</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60055</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Publishing Services</ServicesDesc>
        <CompensationAmt>1251936</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>Freeman Audio Visual</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 650036</AddressLine1Txt>
            <CityNm>DALLAS</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>75265</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Audio Visual Service</ServicesDesc>
        <CompensationAmt>1230716</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>LEVY RESTAURANTS</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>415 SUMMER STREET</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02210</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CATERING Services</ServicesDesc>
        <CompensationAmt>771661</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>CENVEO</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 412401</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02241</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Publishing Services</ServicesDesc>
        <CompensationAmt>424229</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>38</CntrctRcvdGreaterThan100KCnt>
      <MembershipDuesAmt>4070025</MembershipDuesAmt>
      <GovernmentGrantsAmt>2440132</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>1429394</AllOtherContributionsAmt>
      <NoncashContributionsAmt>52042</NoncashContributionsAmt>
      <TotalContributionsAmt>7939551</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>RESEARCH PUBLICATIONS</Desc>
        <BusinessCd>511120</BusinessCd>
        <TotalRevenueColumnAmt>45374766</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>45126783</RelatedOrExemptFuncIncomeAmt>
        <ExclusionAmt>247983</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>SCIENTIFIC MEETINGS</Desc>
        <BusinessCd>541990</BusinessCd>
        <TotalRevenueColumnAmt>8749705</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>8185727</RelatedOrExemptFuncIncomeAmt>
        <ExclusionAmt>563978</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>PUBLIC AFFAIRS PROGRAMS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>325166</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>323166</RelatedOrExemptFuncIncomeAmt>
        <ExclusionAmt>2000</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP OPERATIONS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>1477999</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1354648</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>123351</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>55927636</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>5640977</TotalRevenueColumnAmt>
        <ExclusionAmt>5640977</ExclusionAmt>
      </InvestmentIncomeGrp>
      <IncmFromInvestBondProceedsGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </IncmFromInvestBondProceedsGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>40845</TotalRevenueColumnAmt>
        <ExclusionAmt>40845</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>0</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetRentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>19009272</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>15789352</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>3219920</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>3219920</TotalRevenueColumnAmt>
        <ExclusionAmt>3219920</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <FundraisingDirectExpensesAmt>0</FundraisingDirectExpensesAmt>
      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetIncmFromFundraisingEvtGrp>
      <GamingGrossIncomeAmt>0</GamingGrossIncomeAmt>
      <GamingDirectExpensesAmt>0</GamingDirectExpensesAmt>
      <NetIncomeFromGamingGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetIncomeFromGamingGrp>
      <GrossSalesOfInventoryAmt>0</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueTotalAmt>0</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>72768929</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>54990324</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>123351</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>9715703</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>203857</TotalAmt>
        <ProgramServicesAmt>203857</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>2522977</TotalAmt>
        <ProgramServicesAmt>2522977</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>73290</TotalAmt>
        <ProgramServicesAmt>73290</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <BenefitsToMembersGrp>
        <TotalAmt>0</TotalAmt>
      </BenefitsToMembersGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>2936124</TotalAmt>
        <ProgramServicesAmt>2259281</ProgramServicesAmt>
        <ManagementAndGeneralAmt>210490</ManagementAndGeneralAmt>
        <FundraisingAmt>466353</FundraisingAmt>
      </CompCurrentOfcrDirectorsGrp>
      <CompDisqualPersonsGrp>
        <TotalAmt>0</TotalAmt>
      </CompDisqualPersonsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>20542770</TotalAmt>
        <ProgramServicesAmt>19509318</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1032070</ManagementAndGeneralAmt>
        <FundraisingAmt>1382</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>0</TotalAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>6563626</TotalAmt>
        <ProgramServicesAmt>5404187</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1038991</ManagementAndGeneralAmt>
        <FundraisingAmt>120448</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>1706535</TotalAmt>
        <ProgramServicesAmt>1564742</ProgramServicesAmt>
        <ManagementAndGeneralAmt>106412</ManagementAndGeneralAmt>
        <FundraisingAmt>35381</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>287825</TotalAmt>
        <ProgramServicesAmt>71904</ProgramServicesAmt>
        <ManagementAndGeneralAmt>214649</ManagementAndGeneralAmt>
        <FundraisingAmt>1272</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesLobbyingGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesProfFundraising>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>458821</TotalAmt>
        <ManagementAndGeneralAmt>458821</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>9227635</TotalAmt>
        <ProgramServicesAmt>8897731</ProgramServicesAmt>
        <ManagementAndGeneralAmt>264192</ManagementAndGeneralAmt>
        <FundraisingAmt>65712</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>69428</TotalAmt>
        <ProgramServicesAmt>62441</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5719</ManagementAndGeneralAmt>
        <FundraisingAmt>1268</FundraisingAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>3449034</TotalAmt>
        <ProgramServicesAmt>3193723</ProgramServicesAmt>
        <ManagementAndGeneralAmt>201655</ManagementAndGeneralAmt>
        <FundraisingAmt>53656</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>0</TotalAmt>
      </InformationTechnologyGrp>
      <RoyaltiesGrp>
        <TotalAmt>0</TotalAmt>
      </RoyaltiesGrp>
      <OccupancyGrp>
        <TotalAmt>1657909</TotalAmt>
        <ProgramServicesAmt>1486045</ProgramServicesAmt>
        <ManagementAndGeneralAmt>140767</ManagementAndGeneralAmt>
        <FundraisingAmt>31097</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>2728279</TotalAmt>
        <ProgramServicesAmt>2295842</ProgramServicesAmt>
        <ManagementAndGeneralAmt>409263</ManagementAndGeneralAmt>
        <FundraisingAmt>23174</FundraisingAmt>
      </TravelGrp>
      <PymtTravelEntrtnmntPubOfclGrp>
        <TotalAmt>0</TotalAmt>
      </PymtTravelEntrtnmntPubOfclGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>5668039</TotalAmt>
        <ProgramServicesAmt>5484458</ProgramServicesAmt>
        <ManagementAndGeneralAmt>160419</ManagementAndGeneralAmt>
        <FundraisingAmt>23162</FundraisingAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>0</TotalAmt>
      </InterestGrp>
      <PaymentsToAffiliatesGrp>
        <TotalAmt>0</TotalAmt>
      </PaymentsToAffiliatesGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>846311</TotalAmt>
        <ProgramServicesAmt>746026</ProgramServicesAmt>
        <ManagementAndGeneralAmt>82139</ManagementAndGeneralAmt>
        <FundraisingAmt>18146</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>201502</TotalAmt>
        <ManagementAndGeneralAmt>201502</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>DUES AND SUBSCRIPTIONS</Desc>
        <TotalAmt>425512</TotalAmt>
        <ProgramServicesAmt>406509</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9699</ManagementAndGeneralAmt>
        <FundraisingAmt>9304</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>OTHER PERSONNEL COSTS</Desc>
        <TotalAmt>406150</TotalAmt>
        <ProgramServicesAmt>223196</ProgramServicesAmt>
        <ManagementAndGeneralAmt>173610</ManagementAndGeneralAmt>
        <FundraisingAmt>9344</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MISCELLANEOUS EXPENSES</Desc>
        <TotalAmt>1085139</TotalAmt>
        <ProgramServicesAmt>1420921</ProgramServicesAmt>
        <ManagementAndGeneralAmt>-340693</ManagementAndGeneralAmt>
        <FundraisingAmt>4911</FundraisingAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>61060763</TotalAmt>
        <ProgramServicesAmt>55826448</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4369705</ManagementAndGeneralAmt>
        <FundraisingAmt>864610</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>6321438</BOYAmt>
        <EOYAmt>4890689</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>18055686</BOYAmt>
        <EOYAmt>20464031</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>434809</BOYAmt>
        <EOYAmt>57817</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <AccountsReceivableGrp>
        <BOYAmt>1773693</BOYAmt>
        <EOYAmt>1847590</EOYAmt>
      </AccountsReceivableGrp>
      <ReceivablesFromOfficersEtcGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </ReceivablesFromOfficersEtcGrp>
      <RcvblFromDisqualifiedPrsnGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </RcvblFromDisqualifiedPrsnGrp>
      <OthNotesLoansReceivableNetGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </OthNotesLoansReceivableNetGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>987033</BOYAmt>
        <EOYAmt>1367083</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>23466857</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>6509382</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>17131560</BOYAmt>
        <EOYAmt>16957475</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>152396310</BOYAmt>
        <EOYAmt>181915084</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>16691572</BOYAmt>
        <EOYAmt>19593161</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </InvestmentsProgramRelatedGrp>
      <IntangibleAssetsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </IntangibleAssetsGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>549734</BOYAmt>
        <EOYAmt>603855</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>214341835</BOYAmt>
        <EOYAmt>247696785</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>17668613</BOYAmt>
        <EOYAmt>19589384</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <GrantsPayableGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </GrantsPayableGrp>
      <DeferredRevenueGrp>
        <BOYAmt>17317741</BOYAmt>
        <EOYAmt>15921712</EOYAmt>
      </DeferredRevenueGrp>
      <TaxExemptBondLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TaxExemptBondLiabilitiesGrp>
      <EscrowAccountLiabilityGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </EscrowAccountLiabilityGrp>
      <LoansFromOfficersDirectorsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LoansFromOfficersDirectorsGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <UnsecuredNotesLoansPayableGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </UnsecuredNotesLoansPayableGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>17682</BOYAmt>
        <EOYAmt>10691</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>35004036</BOYAmt>
        <EOYAmt>35521787</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>162243578</BOYAmt>
        <EOYAmt>194267622</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>17094221</BOYAmt>
        <EOYAmt>17907376</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>179337799</BOYAmt>
        <EOYAmt>212174998</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>214341835</BOYAmt>
        <EOYAmt>247696785</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>11708166</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>24508586</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>-3379553</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>true</FederalGrantAuditRequiredInd>
      <FederalGrantAuditPerformedInd>true</FederalGrantAuditPerformedInd>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>6708181</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>7188239</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7961364</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>7553204</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7915543</CurrentTaxYearAmt>
        <TotalAmt>37326531</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>46468446</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>45176249</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>48773882</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>51479197</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>55989493</CurrentTaxYearAmt>
        <TotalAmt>247887267</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>53176627</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>52364488</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>56735246</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>59032401</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>63905036</CurrentTaxYearAmt>
        <TotalAmt>285213798</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <TotalAmt>0</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>285213798</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>5012919</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2914845</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7091731</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>7236363</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5643973</CurrentTaxYearAmt>
        <TotalAmt>27899831</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>85325</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>103054</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>100051</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>127428</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>23190</CurrentTaxYearAmt>
        <TotalAmt>439048</TotalAmt>
      </Post1975UBTIGrp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>5098244</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>3017899</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7191782</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>7363791</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5667163</CurrentTaxYearAmt>
        <TotalAmt>28338879</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>58274871</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>55382387</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>63927028</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>66396192</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>69572199</CurrentTaxYearAmt>
        <TotalAmt>313552677</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.90962</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.90496</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.09038</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.09504</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleC documentId="IRS990ScheduleC">
      <TotalGrassrootsLobbyingGrp>
        <FilingOrganizationsTotalAmt>103333</FilingOrganizationsTotalAmt>
      </TotalGrassrootsLobbyingGrp>
      <TotalDirectLobbyingGrp>
        <FilingOrganizationsTotalAmt>477939</FilingOrganizationsTotalAmt>
      </TotalDirectLobbyingGrp>
      <TotalLobbyingExpendGrp>
        <FilingOrganizationsTotalAmt>581272</FilingOrganizationsTotalAmt>
      </TotalLobbyingExpendGrp>
      <OtherExemptPurposeExpendGrp>
        <FilingOrganizationsTotalAmt>60479491</FilingOrganizationsTotalAmt>
      </OtherExemptPurposeExpendGrp>
      <TotalExemptPurposeExpendGrp>
        <FilingOrganizationsTotalAmt>61060763</FilingOrganizationsTotalAmt>
      </TotalExemptPurposeExpendGrp>
      <LobbyingNontaxableAmountGrp>
        <FilingOrganizationsTotalAmt>1000000</FilingOrganizationsTotalAmt>
      </LobbyingNontaxableAmountGrp>
      <GrassrootsNontaxableGrp>
        <FilingOrganizationsTotalAmt>250000</FilingOrganizationsTotalAmt>
      </GrassrootsNontaxableGrp>
      <TotLbbyngGrassrootMnsNonTxGrp />
      <TotLbbyExpendMnsLbbyngNonTxGrp />
      <AvgLobbyingNontaxableAmountGrp>
        <CurrentYearMinus3Amt>1000000</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>1000000</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>1000000</CurrentYearMinus1Amt>
        <CurrentYearAmt>1000000</CurrentYearAmt>
        <TotalAmt>4000000</TotalAmt>
      </AvgLobbyingNontaxableAmountGrp>
      <LobbyingCeilingAmt>6000000</LobbyingCeilingAmt>
      <AvgTotalLobbyingExpendGrp>
        <CurrentYearMinus3Amt>440935</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>621195</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>627438</CurrentYearMinus1Amt>
        <CurrentYearAmt>581272</CurrentYearAmt>
        <TotalAmt>2270840</TotalAmt>
      </AvgTotalLobbyingExpendGrp>
      <AvgGrassrootsNontaxableGrp>
        <CurrentYearMinus3Amt>250000</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>250000</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>250000</CurrentYearMinus1Amt>
        <CurrentYearAmt>250000</CurrentYearAmt>
        <TotalAmt>1000000</TotalAmt>
      </AvgGrassrootsNontaxableGrp>
      <GrassrootsCeilingAmt>1500000</GrassrootsCeilingAmt>
      <AvgGrassrootsLobbyingExpendGrp>
        <CurrentYearMinus3Amt>33611</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>102882</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>106123</CurrentYearMinus1Amt>
        <CurrentYearAmt>103333</CurrentYearAmt>
        <TotalAmt>345949</TotalAmt>
      </AvgGrassrootsLobbyingExpendGrp>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="IRS990ScheduleD">
      <ArtPublicExhibitionAmountsGrp />
      <HeldWorksArtGrp />
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>5135937</BeginningYearBalanceAmt>
        <ContributionsAmt>404074</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>306263</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>334787</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>5511487</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>4529515</BeginningYearBalanceAmt>
        <ContributionsAmt>549649</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>203647</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>146874</OtherExpendituresAmt>
        <EndYearBalanceAmt>5135937</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>2836571</BeginningYearBalanceAmt>
        <ContributionsAmt>1594749</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>215272</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <OtherExpendituresAmt>117077</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>0</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>4529515</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>2796923</BeginningYearBalanceAmt>
        <ContributionsAmt>62550</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>151143</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <OtherExpendituresAmt>174045</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>0</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>2836571</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>2692389</BeginningYearBalanceAmt>
        <ContributionsAmt>181880</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>102217</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <OtherExpendituresAmt>179563</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>0</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>2796923</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <PrmnntEndowmentBalanceEOYPct>0.89630</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.10370</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>false</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>false</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>196412</OtherCostOrOtherBasisAmt>
        <BookValueAmt>196412</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>20425941</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4918330</DepreciationAmt>
        <BookValueAmt>15507610</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>1265131</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>512995</DepreciationAmt>
        <BookValueAmt>752137</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>598928</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>463660</DepreciationAmt>
        <BookValueAmt>135268</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>980445</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>614398</DepreciationAmt>
        <BookValueAmt>366048</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>16957475</TotalBookValueLandBuildingsAmt>
      <FinancialDerivativesGrp />
      <CloselyHeldEquityInterestsGrp />
      <OtherSecuritiesGrp>
        <Desc>AMERICAN CENTER FOR PHYSICS</Desc>
        <BookValueAmt>4441589</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>HEDGE FUNDS</Desc>
        <BookValueAmt>15151572</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>19593161</TotalBookValueSecuritiesAmt>
      <FederalIncomeTaxLiabilityAmt>10691</FederalIncomeTaxLiabilityAmt>
      <TotalLiabilityAmt>10691</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>93439141</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>24508586</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>24508586</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>68930555</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>458821</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>3379553</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>3838374</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>72768929</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>60601942</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesSubtotalAmt>60601942</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>458821</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>458821</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>61060763</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>EARNINGS ON ENDOWMENT FUNDS ARE USED TO PROVIDE AWARDS TO DISTINGUISHED INDIVIDUALS AND TRAVEL ASSISTANCE IN THE FIELD OF PHYSICS, AS WELL AS TO PROVIDE A SCHOLARSHIP FOR WOMEN PHYSICISTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>APS IS EXEMPT FROM FEDERAL INCOME TAX UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND HAS BEEN CLASSIFIED AS AN ORGANIZATION THAT IS NOT A PRIVATE FOUNDATION. APS HAD AN IMMATERIAL AMOUNT OF UNRELATED BUSINESS INCOME FOR THE YEARS ENDED DECEMBER 31, 2019 AND 2018. UNDER ACCOUNTING STANDARDS CODIFICATION (ASC) 740-10, ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES, AN ORGANIZATION MUST RECOGNIZE THE TAX BENEFIT ASSOCIATED WITH TAX POSITIONS TAKEN FOR TAX RETURN PURPOSES WHEN IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL BE SUSTAINED. APS DOES NOT BELIEVE THERE ARE ANY MATERIAL UNCERTAIN TAX POSITIONS AND; ACCORDINGLY, WILL NOT RECOGNIZE ANY LIABILITY FOR UNRECOGNIZED TAX BENEFITS. APS HAS FILED FOR AND RECEIVED INCOME TAX EXEMPTIONS IN THE JURISDICTIONS WHERE IT IS REQUIRED TO DO SO. ADDITIONALLY, APS HAS FILED INTERNAL REVENUE SERVICE FORM 990 TAX RETURNS AS REQUIRED AND ALL APPLICABLE RETURNS IN THOSE JURISDICTIONS WHERE IT IS REQUIRED. APS BELIEVES THAT IT IS NO LONGER SUBJECT TO U.S. FEDERAL, STATE AND LOCAL, OR NON-U.S. INCOME TAX EXAMINATIONS BY TAX AUTHORITIES FOR YEARS BEFORE 2016. HOWEVER, APS IS STILL OPEN TO EXAMINATIONS BY TAX AUTHORITIES FROM FISCAL YEAR 2015 FORWARD. FOR THE YEARS ENDED DECEMBER 31, 2019 AND 2018, THERE WERE NO INTEREST OR PENALTIES RECORDED IN THE STATEMENTS OF ACTIVITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XI, Line 2D:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN POST-RETIREMENT MEDICAL BENEFITS OTHER THAN NET PERIODIC POST-RETIREMENT MEDICAL COST OF $3,236,276. EQUITY INTEREST IN ACP OF $143,277.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="IRS990ScheduleF">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>39802</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>North America</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>9300</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>13633</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>10555</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>73290</SubtotalSpentAmt>
      <TotalSpentAmt>73290</TotalSpentAmt>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Travel Assistance</TypeOfAssistanceTxt>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <RecipientCnt>42</RecipientCnt>
        <CashGrantAmt>21469</CashGrantAmt>
        <MannerOfCashDisbursementTxt>check/wire</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Travel Assistance</TypeOfAssistanceTxt>
        <RegionTxt>South Asia</RegionTxt>
        <RecipientCnt>26</RecipientCnt>
        <CashGrantAmt>10555</CashGrantAmt>
        <MannerOfCashDisbursementTxt>check/wire</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>North America</RegionTxt>
        <RecipientCnt>4</RecipientCnt>
        <CashGrantAmt>9300</CashGrantAmt>
        <MannerOfCashDisbursementTxt>check/wire</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <RecipientCnt>7</RecipientCnt>
        <CashGrantAmt>13633</CashGrantAmt>
        <MannerOfCashDisbursementTxt>check/wire</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <RecipientCnt>9</RecipientCnt>
        <CashGrantAmt>18333</CashGrantAmt>
        <MannerOfCashDisbursementTxt>check/wire</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule F, Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>RECIPIENTS ARE SELECTED BASED UPON CRITERIA DETERMINED BY OVERSIGHT COMMITTEES. RECIPIENTS PROVIDED LUMP SUM PAYMENTS AT THE BEGINNING OF THE GRANT PERIOD ARE EXPECTED TO SUBMIT FINAL REPORTS DETAILING EXPENDITURES. FUNDS GIVEN ON A "REIMBURSEMENT" BASIS REQUIRE THE RECIPIENT TO PROVIDE APS WITH AN EXPENSE REPORT THAT INCLUDES RECEIPTS FOR HIS/HER EXPENDITURES. IN ADDITION, THE FORMAL PRIZE AND AWARDS ARE BASED UPON PRIOR ACCOMPLISHMENTS AND ARE APPROVED BY THE COUNCIL OF REPRESENTATIVES BEFORE BEING GIVEN TO DISTINGUISHED PHYSICISTS. THE GRANTS OTHER THAN PRIZE AND AWARDS ARE BASED UPON REVIEW BY SENIOR STAFF AND COMMITTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UC SANTA BARBARA REGENTS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ASB BLDG RM 1212</AddressLine1Txt>
          <CityNm>SANTA BARBARA</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93106</ZIPCd>
        </USAddress>
        <RecipientEIN>956006145</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>60000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF UTAH</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>315 S 1400 E</AddressLine1Txt>
          <CityNm>SALT LAKE CITY</CityNm>
          <StateAbbreviationCd>UT</StateAbbreviationCd>
          <ZIPCd>84112</ZIPCd>
        </USAddress>
        <RecipientEIN>876000525</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>20012</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WASHINGTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3910 15th Ave NE</AddressLine1Txt>
          <CityNm>SEATTLE</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98195</ZIPCd>
        </USAddress>
        <RecipientEIN>916001537</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>15589</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF COLORADO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 19</AddressLine1Txt>
          <CityNm>BOULDER</CityNm>
          <StateAbbreviationCd>CO</StateAbbreviationCd>
          <ZIPCd>80309</ZIPCd>
        </USAddress>
        <RecipientEIN>846000555</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>11563</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>ARIZONA STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 873503</AddressLine1Txt>
          <CityNm>TEMPE</CityNm>
          <StateAbbreviationCd>AZ</StateAbbreviationCd>
          <ZIPCd>85287</ZIPCd>
        </USAddress>
        <RecipientEIN>860196696</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10692</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ROCHESTER</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>910 GENESSE ST STE 200</AddressLine1Txt>
          <CityNm>ROCHESTER</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>14611</ZIPCd>
        </USAddress>
        <RecipientEIN>160743209</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10477</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AMERICAN GEOPHYSICAL UNION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2000 FLORIDA AVE NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20009</ZIPCd>
        </USAddress>
        <RecipientEIN>520955532</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10022</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UC BERKELEY FOUNDATION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2195 HEARST AVE RM 159</AddressLine1Txt>
          <CityNm>BERKELEY</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94720</ZIPCd>
        </USAddress>
        <RecipientEIN>946002123</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF HOUSTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3507 Cullen Blvd Rm 617</AddressLine1Txt>
          <CityNm>Houston</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77204</ZIPCd>
        </USAddress>
        <RecipientEIN>746001399</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>8970</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CALIFORNIA NANOSYSTEMS INST</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>Univ of Calif</AddressLine1Txt>
          <CityNm>Santa Barbara</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93106</ZIPCd>
        </USAddress>
        <RecipientEIN>956006145</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>8016</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AMERICAN CHEMICAL SOCIETY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1155 16th Street NW</AddressLine1Txt>
          <CityNm>Washington</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20036</ZIPCd>
        </USAddress>
        <RecipientEIN>530196572</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>7500</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ALABAMA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO Box 8701236</AddressLine1Txt>
          <CityNm>Tuscaloosa</CityNm>
          <StateAbbreviationCd>AL</StateAbbreviationCd>
          <ZIPCd>35487</ZIPCd>
        </USAddress>
        <RecipientEIN>636001138</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>7000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF CENTRAL FLORIDA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>12424 Research Pkwy</AddressLine1Txt>
          <CityNm>Orlando</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>32826</ZIPCd>
        </USAddress>
        <RecipientEIN>592924021</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>6666</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BOSTON UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO Box 28763</AddressLine1Txt>
          <CityNm>New York</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10087</ZIPCd>
        </USAddress>
        <RecipientEIN>042103547</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>6304</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF MARYLAND</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>Room 4101</AddressLine1Txt>
          <CityNm>College Park</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>20742</ZIPCd>
        </USAddress>
        <RecipientEIN>526002033</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>6048</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>15</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-HONORARIUMS</GrantTypeTxt>
        <RecipientCnt>73</RecipientCnt>
        <CashGrantAmt>168602</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-TRAVEL ASSISTANCE</GrantTypeTxt>
        <RecipientCnt>314</RecipientCnt>
        <CashGrantAmt>174692</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-TRAVEL GRANTS</GrantTypeTxt>
        <RecipientCnt>696</RecipientCnt>
        <CashGrantAmt>261400</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>53</RecipientCnt>
        <CashGrantAmt>82784</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-MEETING FEE WAIVERS</GrantTypeTxt>
        <RecipientCnt>89</RecipientCnt>
        <CashGrantAmt>8490</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-CHILD CARE GRANTS</GrantTypeTxt>
        <RecipientCnt>36</RecipientCnt>
        <CashGrantAmt>14816</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-OTHER EXPENSES</GrantTypeTxt>
        <RecipientCnt>68</RecipientCnt>
        <CashGrantAmt>165693</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PRIZES AND AWARDS-STIPENDS, CERTIFICATES, &amp; TRAVEL</GrantTypeTxt>
        <RecipientCnt>462</RecipientCnt>
        <CashGrantAmt>969051</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STIPENDS-PARTICIPANTS</GrantTypeTxt>
        <RecipientCnt>6</RecipientCnt>
        <CashGrantAmt>8000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>TRAVEL-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>492</RecipientCnt>
        <CashGrantAmt>658836</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>SUBSISTENCE-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>8</RecipientCnt>
        <CashGrantAmt>4064</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>OTHER-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>16</RecipientCnt>
        <CashGrantAmt>6550</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>RECIPIENTS ARE SELECTED BASED UPON CRITERIA DETERMINED BY OVERSIGHT COMMITTEES. RECIPIENTS PROVIDED LUMP SUM PAYMENTS AT THE BEGINNING OF THE GRANT PERIOD ARE EXPECTED TO SUBMIT FINAL REPORTS DETAILING EXPENDITURES. FUNDS GIVEN ON A "REIMBURSEMENT" BASIS REQUIRE THE RECIPIENT TO PROVIDE APS WITH AN EXPENSE REPORT THAT INCLUDES RECEIPTS FOR HIS/HER EXPENDITURES. IN ADDITION, THE FORMAL PRIZES AND AWARDS ARE BASED UPON PRIOR ACCOMPLISHMENTS AND ARE APPROVED BY THE COUNCIL OF REPRESENTATIVES BEFORE BEING GIVEN TO DISTINGUISHED PHYSICISTS. SUBAWARDS OF FEDERAL GRANTS ARE PREAPPROVED BY THE APPLICABLE FEDERAL AGENCY AND A MEMORANDUM OF UNDERSTANDING IS EXECUTED WITH THE RECIPIENT CITING THE FEDERAL REQUIREMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ">
      <IdemnificationGrossUpPmtsInd>X</IdemnificationGrossUpPmtsInd>
      <WrittenPolicyRefTAndEExpnssInd>true</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>true</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARGARET BANDERA</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>256960</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>25000</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12158</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>17662</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>316780</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MICHAEL THOENNESSEN</PersonNm>
        <TitleTxt>EDITOR-IN-CHIEF</TitleTxt>
        <BaseCompensationFilingOrgAmt>335554</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28000</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20787</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>389341</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JEANETTE RUSSO</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <BaseCompensationFilingOrgAmt>113113</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>3000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12415</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28583</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>157111</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>FRANCIS SLAKEY</PersonNm>
        <TitleTxt>CHIEF GOVERNMENT OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>233197</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>16119</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28583</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>282899</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MATTHEW SALTER</PersonNm>
        <TitleTxt>PUBLISHER</TitleTxt>
        <BaseCompensationFilingOrgAmt>243046</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>25364</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28583</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>301993</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARK DOYLE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>273106</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28000</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28583</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>334689</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMES TAYLOR</PersonNm>
        <TitleTxt>CHIEF OPERATING OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>263406</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>10000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>27493</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10395</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>311294</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>THEODORE HODAPP</PersonNm>
        <TitleTxt>DIR of Project Development</TitleTxt>
        <BaseCompensationFilingOrgAmt>218340</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>5400</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>22804</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20787</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>267331</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>AMY FLATTEN</PersonNm>
        <TitleTxt>DIR OF INTERNATIONAL AFFAIRS</TitleTxt>
        <BaseCompensationFilingOrgAmt>206677</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>4600</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>21181</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10395</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>242853</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>DANIEL KULP</PersonNm>
        <TitleTxt>ASSOCIATE EDITORIAL DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>204691</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>20913</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28583</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>254187</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PAUL DLUG</PersonNm>
        <TitleTxt>DIR OF JOURNAL INFORMATION SVC</TitleTxt>
        <BaseCompensationFilingOrgAmt>210216</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>21071</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10395</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>241682</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christine Giaccone</PersonNm>
        <TitleTxt>Director of Journal Operations</TitleTxt>
        <BaseCompensationFilingOrgAmt>202788</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>3000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>20586</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>226374</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATE P KIRBY</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>525715</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>700</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28000</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20787</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>575202</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a:</FormAndLineReferenceDesc>
        <ExplanationTxt>MARGARET BANDERA RECEIVED RELOCATION ASSISTANCE AND IT HAS BEEN INCLUDED IN TAXABLE INCOME.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp />
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp />
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>4</ContributionCnt>
        <NoncashContributionsRptF990Amt>52042</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp />
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>false</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 9, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>AMERICAN PHYSICAL SOCIETY REPORTS THE NUMBER OF CONTRIBUTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6:</FormAndLineReferenceDesc>
        <ExplanationTxt>APS HAS 54,069 MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A:</FormAndLineReferenceDesc>
        <ExplanationTxt>SOCIETY MEMBERS ELECT THE PRESIDENTIAL LINE (PRESIDENT, PRESIDENT-ELECT, VICE PRESIDENT, AND PAST PRESIDENT) WHO SIT UPON THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERS OF THE GOVERNING BODY RECEIVE A COPY OF THE FORM 990 BEFORE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C:</FormAndLineReferenceDesc>
        <ExplanationTxt>EMPLOYEES AND GOVERNING BODY MEMBERS ARE ASKED TO COMPLETE A CONFLICT OF INTEREST REPORT ANNUALLY THAT IS REVIEWED BY THE CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER FOR POTENTIAL CONFLICTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE APPROVES THE ANNUAL COMPENSATION OF THE CHIEF EXECUTIVE OFFICER AND OTHER OFFICERS. COMPENSATION FOR KEY EMPLOYEES IS DETERMINED BY THE CHIEF EXECUTIVE OFFICER. COMPENSATION SURVEYS ARE USED AS PART OF THE PROCESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE APS GOVERNING DOCUMENTS, FINANCIAL STATEMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE ONLINE AT THE ORGANIZATION'S WEBSITE. THE FINANCIAL STATEMENTS ARE INCLUDED IN THE APS ANNUAL REPORT. THE DOCUMENTS ARE ALSO AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN POST-RETIREMENT MEDICAL BENEFITS OTHER THAN NET PERIODIC POST-RETIREMENT MEDICAL BENEFIT COST OF ($3,236,276). EQUITY INTEREST IN ACP ($143,277)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:CONSULTANT FEES TOTAL FEES:9227635</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>