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        <PersonNm>KATE P KIRBY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KEN COLE</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
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        <OfficerInd>X</OfficerInd>
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        <OtherCompensationAmt>32524</OtherCompensationAmt>
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        <PersonNm>MICHAEL THOENNESSEN</PersonNm>
        <TitleTxt>EDITOR-IN-CHIEF</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARGARET BANDERA</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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        <PersonNm>JANE HOPKINS GOULD</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>FRANCIS SLAKEY</PersonNm>
        <TitleTxt>CHIEF GOVERNMENT OFFICER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MATHEW SALTER</PersonNm>
        <TitleTxt>PUBLISHER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARK DOYLE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES TAYLOR</PersonNm>
        <TitleTxt>CHIEF OPERATING OFFICER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>THEODORE HODAPP</PersonNm>
        <TitleTxt>DIR of Project Development</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>AMY FLATTEN</PersonNm>
        <TitleTxt>DIR OF INTERNATIONAL AFFAIRS</TitleTxt>
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        <PersonNm>DANIEL KULP</PersonNm>
        <TitleTxt>ASSOCIATE EDITORIAL DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PAUL DLUG</PersonNm>
        <TitleTxt>DIR OF JOURNAL INFORMATION SVC</TitleTxt>
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        <PersonNm>Christine Giaccone</PersonNm>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>IENEGIZER APTARA LIMITED</PersonNm>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>13963 Collections Cntr Drive BOX 1</AddressLine1Txt>
            <CityNm>CHICAGO</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60693</ZIPCd>
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        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>Lumina Datamatics Inc</PersonNm>
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          <USAddress>
            <AddressLine1Txt>DEPT CH 16508</AddressLine1Txt>
            <CityNm>PALATINE</CityNm>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>Freeman Audio Visual</PersonNm>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>P O BOX 650036</AddressLine1Txt>
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            <StateAbbreviationCd>TX</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>LEVY RESTAURANTS</PersonNm>
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        <ContractorAddress>
          <USAddress>
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            <CityNm>BOSTON</CityNm>
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            <ZIPCd>02210</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
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          <USAddress>
            <AddressLine1Txt>ONE HARGROVE DRIVE</AddressLine1Txt>
            <CityNm>LANHAM</CityNm>
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      <MembershipDuesAmt>4058548</MembershipDuesAmt>
      <GovernmentGrantsAmt>1964150</GovernmentGrantsAmt>
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      <TotalContributionsAmt>7553204</TotalContributionsAmt>
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        <Desc>SCIENTIFIC MEETINGS</Desc>
        <BusinessCd>541990</BusinessCd>
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      <ProgramServiceRevenueGrp>
        <Desc>PUBLIC AFFAIRS PROGRAMS</Desc>
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      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP OPERATIONS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>207313</TotalRevenueColumnAmt>
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        <ExclusionAmt>7148</ExclusionAmt>
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        <PersonalAmt>0</PersonalAmt>
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        <ProgramServicesAmt>151383</ProgramServicesAmt>
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        <ProgramServicesAmt>73386</ProgramServicesAmt>
        <ManagementAndGeneralAmt>57861</ManagementAndGeneralAmt>
        <FundraisingAmt>1487</FundraisingAmt>
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        <ManagementAndGeneralAmt>450945</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>14287</ProgramServicesAmt>
        <ManagementAndGeneralAmt>667</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>2629724</ProgramServicesAmt>
        <ManagementAndGeneralAmt>158137</ManagementAndGeneralAmt>
        <FundraisingAmt>49126</FundraisingAmt>
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        <ProgramServicesAmt>1559639</ProgramServicesAmt>
        <ManagementAndGeneralAmt>128125</ManagementAndGeneralAmt>
        <FundraisingAmt>26045</FundraisingAmt>
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        <ProgramServicesAmt>2231736</ProgramServicesAmt>
        <ManagementAndGeneralAmt>359570</ManagementAndGeneralAmt>
        <FundraisingAmt>30379</FundraisingAmt>
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      <PymtTravelEntrtnmntPubOfclGrp>
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      </PymtTravelEntrtnmntPubOfclGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>4946508</TotalAmt>
        <ProgramServicesAmt>4774625</ProgramServicesAmt>
        <ManagementAndGeneralAmt>157030</ManagementAndGeneralAmt>
        <FundraisingAmt>14853</FundraisingAmt>
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      <PaymentsToAffiliatesGrp>
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        <ProgramServicesAmt>706998</ProgramServicesAmt>
        <ManagementAndGeneralAmt>70171</ManagementAndGeneralAmt>
        <FundraisingAmt>14264</FundraisingAmt>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>143663</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
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        <TotalAmt>410104</TotalAmt>
        <ProgramServicesAmt>392372</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9261</ManagementAndGeneralAmt>
        <FundraisingAmt>8471</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>OTHER PERSONNEL COSTS</Desc>
        <TotalAmt>393030</TotalAmt>
        <ProgramServicesAmt>182666</ProgramServicesAmt>
        <ManagementAndGeneralAmt>196806</ManagementAndGeneralAmt>
        <FundraisingAmt>13558</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>MISCELLANEOUS EXPENSES</Desc>
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      <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, 2018 and 2017. 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 2015. However, APS is still open to examinations by tax authorities from fiscal year 2015 forward. For the years ended December 31, 2018 and 2017, there were no interest or penalties recorded in the statements of activities.</ExplanationTxt>
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      <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 $2,066,107. Net Assets released from restrictions of $1,022,465.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XII, Line 2d:</FormAndLineReferenceDesc>
        <ExplanationTxt>Net assets released from restrictions of $1,022,465.</ExplanationTxt>
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    </IRS990ScheduleD>
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        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>78353</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>South America</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>35000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Middle East and North Africa</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>5000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>North America</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>21249</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>7658</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>GRANTS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>4123</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalSpentAmt>151383</SubtotalSpentAmt>
      <TotalSpentAmt>151383</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>GRANTMAKING</PurposeOfGrantTxt>
        <CashGrantAmt>13000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>South America</RegionTxt>
        <PurposeOfGrantTxt>GRANTMAKING</PurposeOfGrantTxt>
        <CashGrantAmt>31000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>2</Total501c3OrgCnt>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Travel Assistance</TypeOfAssistanceTxt>
        <RegionTxt>South America</RegionTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>4000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Travel Assistance</TypeOfAssistanceTxt>
        <RegionTxt>North America</RegionTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHCEK/WIRE</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Participant Costs</TypeOfAssistanceTxt>
        <RegionTxt>South Asia</RegionTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>7658</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <RecipientCnt>28</RecipientCnt>
        <CashGrantAmt>65353</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>North America</RegionTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>18249</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK/WIRE</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Prizes and Awards</TypeOfAssistanceTxt>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>4123</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>CALIFORNIA STATE UNIVERSITY-FRESNO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2345 E SAN RAMON FRESNO</AddressLine1Txt>
          <CityNm>FRESNO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93740</ZIPCd>
        </USAddress>
        <RecipientEIN>946003272</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>23232</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>FLORIDA INTERNATIONAL UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>11200 SW 8TH STREET</AddressLine1Txt>
          <CityNm>MIAMI</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>33199</ZIPCd>
        </USAddress>
        <RecipientEIN>650177616</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>72612</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>FLORIDA STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>874 TRADITIONS WAY</AddressLine1Txt>
          <CityNm>TALLAHASSEE</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>32304</ZIPCd>
        </USAddress>
        <RecipientEIN>591961248</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>31436</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>INDIANA UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 78000</AddressLine1Txt>
          <CityNm>Bloomington</CityNm>
          <StateAbbreviationCd>IN</StateAbbreviationCd>
          <ZIPCd>482780867</ZIPCd>
        </USAddress>
        <RecipientEIN>356001673</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>30064</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE OHIO STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1960 KENNY RD</AddressLine1Txt>
          <CityNm>COLUMBUS</CityNm>
          <StateAbbreviationCd>OH</StateAbbreviationCd>
          <ZIPCd>432107505</ZIPCd>
        </USAddress>
        <RecipientEIN>316025986</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>9432</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>ROCHESTER INSTITUTE OF TECHNOLOGY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>85 LOMB MEMORIAL DRIVE</AddressLine1Txt>
          <CityNm>ROCHESTER</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>14623</ZIPCd>
        </USAddress>
        <RecipientEIN>160743140</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>9824</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>ROWAN UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3RD FLOOR JAMES HALL</AddressLine1Txt>
          <CityNm>GLASSBORO</CityNm>
          <StateAbbreviationCd>NH</StateAbbreviationCd>
          <ZIPCd>08028</ZIPCd>
        </USAddress>
        <RecipientEIN>222764819</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>78322</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>TEXAS STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>601 UNIVERSITY DR</AddressLine1Txt>
          <CityNm>SAN MARCOS</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>78666</ZIPCd>
        </USAddress>
        <RecipientEIN>222764819</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>53862</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF CENTRAL FLORIDA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>12424 RESEARCH PKWAY</AddressLine1Txt>
          <CityNm>ORLANDO</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>328263249</ZIPCd>
        </USAddress>
        <RecipientEIN>592924021</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>60939</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AAAS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1200 NEW YORK AVE NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20005</ZIPCd>
        </USAddress>
        <RecipientEIN>530196568</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS MEDIA FELLOW</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF CINCINNATI</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>345 CLIFTON COURT</AddressLine1Txt>
          <CityNm>CINCINNATI</CityNm>
          <StateAbbreviationCd>OH</StateAbbreviationCd>
          <ZIPCd>452210011</ZIPCd>
        </USAddress>
        <RecipientEIN>316000989</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>RUTGERS THE STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>311 NORTH 5TH ST</AddressLine1Txt>
          <AddressLine2Txt>RUTGER UNIV</AddressLine2Txt>
          <CityNm>CAMDEN</CityNm>
          <StateAbbreviationCd>NJ</StateAbbreviationCd>
          <ZIPCd>08102</ZIPCd>
        </USAddress>
        <RecipientEIN>226001086</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>22925</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF SOUTHERN CALIFORNIA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>SPONSORED PROJECTS ACCOUNTING</AddressLine1Txt>
          <CityNm>LA</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>90074</ZIPCd>
        </USAddress>
        <RecipientEIN>951642394</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>86934</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ALASKA ANCHORAGE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 141628</AddressLine1Txt>
          <CityNm>ANCHORAGE</CityNm>
          <StateAbbreviationCd>AK</StateAbbreviationCd>
          <ZIPCd>995141628</ZIPCd>
        </USAddress>
        <RecipientEIN>926000147</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>8896</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AMERICAN ASSOCIATION OF PHYSICS TEACHERS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ONE PHYSICS ELLIPSE</AddressLine1Txt>
          <CityNm>COLLEGE PARK</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>20740</ZIPCd>
        </USAddress>
        <RecipientEIN>520749775</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>18765</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>COLORADO SCHOOL OF MINES</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 911911</AddressLine1Txt>
          <CityNm>DENVER</CityNm>
          <StateAbbreviationCd>CO</StateAbbreviationCd>
          <ZIPCd>802941911</ZIPCd>
        </USAddress>
        <RecipientEIN>846000551</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>124829</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WEST VIRGINIA UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>WHITE HALL BOX 6315</AddressLine1Txt>
          <CityNm>MORGANTOWN</CityNm>
          <StateAbbreviationCd>WV</StateAbbreviationCd>
          <ZIPCd>25606</ZIPCd>
        </USAddress>
        <RecipientEIN>550665758</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>21723</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BOISE STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1910 UNIVERSITY DRIVE</AddressLine1Txt>
          <CityNm>BOISE</CityNm>
          <StateAbbreviationCd>ID</StateAbbreviationCd>
          <ZIPCd>832751247</ZIPCd>
        </USAddress>
        <RecipientEIN>820290701</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>7184</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>NYU TANDON SCHOOL ENGINEERING</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1 METROTECH CTR 19 FL</AddressLine1Txt>
          <CityNm>BROOKLYN</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>11201</ZIPCd>
        </USAddress>
        <RecipientEIN>135562308</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>NEW MEXICO CONSORTIUM</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4200 W JEMEZ RD</AddressLine1Txt>
          <AddressLine2Txt>STE 200</AddressLine2Txt>
          <CityNm>LOS ALAMOS</CityNm>
          <StateAbbreviationCd>NM</StateAbbreviationCd>
          <ZIPCd>87544</ZIPCd>
        </USAddress>
        <RecipientEIN>260370262</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>5073</CashGrantAmt>
        <PurposeOfGrantTxt>PHYSICS EDUCATION</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>20</Total501c3OrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-HONORARIUMS</GrantTypeTxt>
        <RecipientCnt>30</RecipientCnt>
        <CashGrantAmt>117450</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-TRAVEL ASSISTANCE</GrantTypeTxt>
        <RecipientCnt>233</RecipientCnt>
        <CashGrantAmt>142737</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-TRAVEL GRANTS</GrantTypeTxt>
        <RecipientCnt>401</RecipientCnt>
        <CashGrantAmt>174598</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>20</RecipientCnt>
        <CashGrantAmt>69079</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-MEETING FEE WAIVERS</GrantTypeTxt>
        <RecipientCnt>98</RecipientCnt>
        <CashGrantAmt>21365</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-CHILD CARE GRANTS</GrantTypeTxt>
        <RecipientCnt>43</RecipientCnt>
        <CashGrantAmt>13702</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PROGRAMS-OTHER EXPENSES</GrantTypeTxt>
        <RecipientCnt>48</RecipientCnt>
        <CashGrantAmt>193594</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>PRIZES AND AWARDS-STIPENDS, CERTIFICATES, &amp; TRAVEL</GrantTypeTxt>
        <RecipientCnt>155</RecipientCnt>
        <CashGrantAmt>536101</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STIPENDS-PARTICIPANTS</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>1500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>TRAVEL-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>221</RecipientCnt>
        <CashGrantAmt>165355</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>SUBSISTENCE-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>31</RecipientCnt>
        <CashGrantAmt>211009</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>OTHER-PARTICIPANT SUPPORT</GrantTypeTxt>
        <RecipientCnt>24</RecipientCnt>
        <CashGrantAmt>7167</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>KATE P KIRBY</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>490951</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>24500</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19137</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>534588</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KEN COLE</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <BaseCompensationFilingOrgAmt>131589</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>10000</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>13387</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19137</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>174113</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARGARET BANDERA</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>152700</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>27396</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>17662</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>197758</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MICHAEL THOENNESSEN</PersonNm>
        <TitleTxt>EDITOR-IN-CHIEF</TitleTxt>
        <BaseCompensationFilingOrgAmt>322765</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>21270</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19137</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>363172</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JANE HOPKINS GOULD</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>73749</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>71191</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>12515</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>6292</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>163747</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>FRANCIS SLAKEY</PersonNm>
        <TitleTxt>CHIEF GOVERNMENT OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>218938</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>20614</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>26313</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>265865</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MATHEW SALTER</PersonNm>
        <TitleTxt>PUBLISHER</TitleTxt>
        <BaseCompensationFilingOrgAmt>234360</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>2000</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>21337</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>26313</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>284010</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARK DOYLE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>257817</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>26558</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>26313</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>310688</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMES TAYLOR</PersonNm>
        <TitleTxt>CHIEF OPERATING OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>235643</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>22710</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19137</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>277490</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>THEODORE HODAPP</PersonNm>
        <TitleTxt>DIR of Project Development</TitleTxt>
        <BaseCompensationFilingOrgAmt>211322</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>5000</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>21416</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19137</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>256875</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>AMY FLATTEN</PersonNm>
        <TitleTxt>DIR OF INTERNATIONAL AFFAIRS</TitleTxt>
        <BaseCompensationFilingOrgAmt>202090</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>20064</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>9570</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>231724</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>DANIEL KULP</PersonNm>
        <TitleTxt>ASSOCIATE EDITORIAL DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>199280</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>20314</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>26313</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>245907</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PAUL DLUG</PersonNm>
        <TitleTxt>DIR OF JOURNAL INFORMATION SVC</TitleTxt>
        <BaseCompensationFilingOrgAmt>202869</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>19702</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>9570</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>232141</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christine Giaccone</PersonNm>
        <TitleTxt>Director of Journal Operations</TitleTxt>
        <BaseCompensationFilingOrgAmt>197811</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>19471</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>217282</TotalCompensationFilingOrgAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a:</FormAndLineReferenceDesc>
        <ExplanationTxt>MOVING EXPENSES WERE GROSSED-UP FOR NEWLY HIRED OFFICERS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp />
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp />
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>36449</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp />
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <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 55,158 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 $2,066,107.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:CONSULTANT FEES TOTAL FEES:8809614</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>