search:Fifteenth Congress of Hygiene and Demography. Letter from the Secretary of the Treasury, calling attention to House Document No. 615 on the subject of an appropriation to pay expenses of federal exhibits for the Fifteenth International Congress on Hygiene and Demography and transmitting communications received by the Treasury Department from the Secretaries of War, Navy, Interior, Agriculture, and Commerce and Labor upon that subject United States. Congress. House. Committee

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