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Correspondence, reports, memoranda, case records, photographs and printed material. The archive include central and district administrative records; cammittee correspondence and minutes; and files on the various programs--such as sheltered workshops, tuberculosis sanitariums and health centers, public baths and employment bureaus--run by the two organizations. The archive also contains hundreds of photographs, including works by Lewis Hine and Jessie Tarbox Beals; extensive casework files from the beginning of social work (originally referred to as "friendly visiting among the poor"); and copies of masters and doctoral theses from the New York School of Sociel Work and other schools. Much of the research for these theses was based on the CSS files

Professional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round

This collection includes nine letters of Ralph Waldo Emerson as well as letters of Louis Agassiz, Amos Bronson Alcott, Oliver Wendell Holmes, Sr., Henry Wadsworth Longfellow, James Russell Lowell, John Lothrop Motley, Charles Sumner, and John Greenleaf Whittier. In addition, there are two incomplete manuscripts by Emerson and one document from the Liverpool Custom-house signed by Nathaniel Hawthorne as Consul for the United States. The collection also includes the corrected typescript, index, and page and galley proofs for Thomas Franklin Currier, A BIBLIOGRAPHY OF OLIVER WENDELL HOLMES (New York, 1953) which was edited by Professor Tilton. Also, some early correspondence and photographs of the Tilton family and friends. There are letters from the actors Annie Louise Ames, Richard J. Dillon, and Hans L. Meery to Tilton's grandfather, Bernard Paul Verne, as well as photographs, tintypes, and daguerreotypes of the Verne family and friends.

This collection includes records from the Chinese Industrial Cooperatives (CIC, 工業合作社/工业合作社), China Aid Council (CAC, 美國援華會/美国援华会), and United Service to China (USC, formerly United Relief to China/URC, 美國援華聯合會/美国援华联合会/美國援華救濟聯合會/美国援华救济联合会). The records contain correspondence of individuals who participated in the cooperative and those associated with it; typewritten reports of sub-units to the parent organization; periodicals and other publications issued in Chinese by the three regional headquarters (the early ones are probably quite rare); publications in English by these headquarters and by American committees formed to aid in the movement; mounted photographs showing the work of the cooperatives and their leaders; albums of newspaper clippings on the movement, emanating from the U.S. and abroad; maps showing locations of cooperatives; pencil sketches and watercolors of cooperatives at work; and other material concerning this important organization which was largely responsible for China's ability to feed and clothe, and care for the people during the war.

The professional and personal correspondence, papers, and pamphlet collection of Melvil Dewey, relating to libraries, the American Library Association, library classification, the Lake Placid Club, Columbia College, the New York State Library, and spelling reform. Included are notes for and a typescript of Grosvenor Dawe's biography of Dewey.

Correspondence, manuscripts, documents, and newspapers. These include over four hundred letters to Alexander, as well as miscellaneous letters and telegrams; some of his manuscripts and notes; business records of his law firm; military documents of the western divisions of the Confederate Army; copybooks and letter books; and complete and partial newspapers and clippings from the various Southern newspapers (in particular THE SAVANNAH REPUBLICAN, the DAILY DISPATCH of Richmond, and the ADVERTISER AND REGISTER of Mobile) which carried Alexander's dispatches.