. "The Act of July 1, 1836, 5 Stat. 64, pledged the faith of the United States that all the monies or other funds which might be received for, or on account of the legacy, should be applied, in such manner as Congress should direct, to the purpose of founding and endowing at Washington, under the name of the Smithsonian Institution, an establishment for the increase and diffusion of knowledge among m" . . .