Search Results
Edwin H. Armstrong papers, 1886-1982, bulk 1912-1954
295.7 linear feetProfessional 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
William A. Boring architectural drawings and papers, 1859-1937
1 print boxAlso, typescripts of lectures delivered by Boring in architecture courses at Columbia, 1932-1933, miscellaneous typescripts of articles and printed materials, 1930-1933, and a typescript of Boring's autobiography, MEMORIES OF THE LIFE AND WORK OF WILLIAM A. BORING, circa 1937. Also included are four sketches by Henri Gauthier, Edward Tilton, Maurice Sashin, and Joseph Laudin.
Charles F. Chandler papers, 1847-1937, bulk 1864-1925
135.25 linear feetColumbia University Library Office files, 1890-1998
48.37 linear feetHotel for D.O. Mills at West 39th Street and Seventh Avenue N.Y.C. / Copeland & Dole, 1905-1906
12 drawingsDrawings show plans, elevations, and sections, and structural framing plan.
Andrew W. Cordier papers, 1918-1975
160 linear feetThomas Egleston papers, 1857-1901
4.5 linear feetProfessional correspondence of Egleston, consisting of incoming letters and technical reports relating to mining engineering and metallurgy; and carbon copies of correspondence between Egleston and Seth Low for the years 1890 to 1900.
Frederick Fried Coney Island collection, 1847-2001
32.62 linear feetJohn L. Gerig papers, 1905-1988
3 linear feetCorrespondence, research notes, articles, clippings, photostats, and photographs. These files concern his interest in Pierre Bayle, Antoine Arlier, and the Renaissance in Provence, as well as the Romanic Review, philology, French, Spanish, and celtic studies. Among the correspondents are: Philippe Berthelot, Nicholas Murray Butler, F.R. Coudert, John H. Finley, the Prince de Ligne, Curtis Hidden Page, William B. Parsons, and Aime ́Puech.
International Institute of Rural Reconstruction records, 1914-2018
163 linear feetCorrespondence, manuscripts, lectures, notes, diaries, notebooks, reports, financial records, blueprints, photographs, and printed materials of Y.C. James Yen and the IIRR concerned with the development, sharing, and financing innovative methods of teaching, improving agriculture, health and family planning, and education in impoverished villages. Among the cataloged correspondents are: Pearl Buck, William O. Douglas, Nelson Rockefeller, and DeWitt Clinton.
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