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Professional and personal correspondence, manuscripts and notes for his many publications in the social sciences and Renaissance studies, drafts and notes for his THE IDEA OF USURY and writings about Max Weber, other papers collected during his teaching career, and materials for the many professional conferences which he attended and for the academic associations and societies in which he was active.

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

Project materials, including reports, monographs, books, articles, Masters essays, Doctoral dissertations, foreign publications, administrative records, correspondence, minutes and audio-visual materials.

Correspondence, manuscripts, notes, drafts of speeches, appointment books, subject files, documents, photographs, memorabilia and printed materials. There are notes from her lectures on Sociology at Adelphi College in 1911-1912; papers from 1912-1932, when Perkins served on the Commission for Safety and on the Industrial Commission of New York State; the main body of the material is from the period of her cabinet office, 1933-1945; and some items from her days on the Civil Service Commission, 1946-1953. Also included are personal and family papers.

The Telford Taylor Papers collect the work of Telford Taylor as a lawyer, legal scholar, writer, and historian. The documents include Taylor's work in Nuremberg with the International and Nuremberg Military Tribunals, his work within departments created by the New Deal, some of his legal case files (particularly on civil liberties cases), and other professional interests that Taylor had. The collection also contains Taylor's writings including drafts of his books, speeches, interviews, teaching materials, and much of the research behind these pursuits. The genre of materials includes official reports, correspondence, manuscripts, annotated texts and photographs. The collection also contains Taylor's research materials in the form of annotations, notes, and clippings.

Reports, articles, case histories, and clippings representing a partial record of the anti-child labor movement. To a large extent, these documents are the work of Charles Lionel Chute.