At 16th and P Streets NW. is the Carnegie Institution of Washington. The building was designed by Carrére and Hastings, and shows an influence of the French classical style of architecture. CHAMBER OF COMMERCE OF THE UNITED STATES Dedicated in 1925, this building, at Connecticut Avenue and H Streets NW., is classical in its style of architecture and is adapted to modern office requirements. It was designed by Cass Gilbert, architect. Fully 13,000 business men representing almost 200 cities of the United States contributed toward the building. NATIONAL GEOGRAPHIC SOCIETY The National Geographic Society, organized in 1888, “for the increase and diffusion of geographic knowledge,” is the largest educational and scientific body in the world. In its 50 years the society has sponsored a series of notable explorations, discoveries, and research activities of our times, and it has developed its unique and beautifully illustrated National Geographic Magazine as a means of disseminating geographic information among its world-wide membership. [Illustration: NATIONAL GEOGRAPHIC SOCIETY] [Illustration: CONSTITUTION HALL] The society’s administrative and editorial offices, at Sixteenth and M Streets NW., were enlarged by an addition which extends its handsome and dignified headquarters along a 214-foot frontage. A commodious and modern office building at Third Street and Randolph Place NE., is used for mailing its magazine, maps, and communications to its world-wide membership. In its editorial, research, technical, photographic, and clerical departments, and in the publishing of the National Geographic Magazine, the society now employs more than 800 persons. It is the largest non-Government user of the National Capital’s post office facilities. The society’s members, numbering 1,150,000 (December, 1938), represent every community of 100 or more persons in the United States, while its foreign membership of 183,709 includes residents in every country, colony, principality, and mandated area of the world which has any semblance of a postal system. To each member goes monthly the National Geographic Magazine, which has been called the foremost educational periodical in the world; each member also receives every map and panoramic illustration as issued. Thus the society has distributed among its more than a million member homes some 20,000,000 wall maps, in color, in addition to the numerous sketch maps which accompany articles in the magazine.