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Start Over Subjects Government Agencies ✖Remove constraint Subjects: Government Agencies Titles [Exterior view of the Hygienic Laboratory, located on a five-acre site on the old Naval Observatory grounds at 25th and E Streets, N.W., Washington, D.C.] ✖Remove constraint Titles: [Exterior view of the Hygienic Laboratory, located on a five-acre site on the old Naval Observatory grounds at 25th and E Streets, N.W., Washington, D.C.] Genre Pictorial Works ✖Remove constraint Genre: Pictorial Works

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  • [Exterior view of the Hygienic Laboratory, located on a five-acre site on the old Naval Observatory grounds at 25th and E Streets, N.W., Washington, D.C.]1