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Books by D.C.) Philosophical Society of Washington (Washington:

Books in the extended shelves:

• Philosophical Society of Washington (Washington, D.C.): Directory of scientific societies of Washington; comprising an Anthropological, Biological, Chemical, Entomological, Geological, National Geographic, and Philosophic societies. (Joint Commission., 1889), also by National Geographic Society (U.S.), Geological Society of Washington, Entomological Society of Washington, D.C.) Chemical Society of Washington (Washington, Biological Society of Washington, and D.C.) Anthropological Society of Washington (Washington (page images at HathiTrust)
• Philosophical Society of Washington (Washington, D.C.): Organization and membership. (Washington, 1871) (page images at HathiTrust)
• Philosophical Society of Washington (Washington, D.C.): Samuel Pierpont Langley (Philosophical Society of Washington, 1907), also by Cyrus Adler (page images at HathiTrust)
• Philosophical Society of Washington (Washington, D.C.): Simon Newcomb : memorial addresses (Philosophical Society of Washington, 1910), also by Charles Kasson Wead (page images at HathiTrust)

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