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Mostly testimonial letters from satisfied clients of A.P. Watt, praising his services. Many of the letters were published in promotional brochures. Two of these books, COLLECTION OF LETTERS ADDRESSED TO A.P. WATT BY VARIOUS WRITERS (London, 1893) & LETTERS ADDRESSED TO A.P. WATT (London, 1894), are included in the collection. There were other editions published in 1889, 1898, 1899, 1924, 1929, etc.

This collection is primarily concerned with Prof. James Renwick and his professional correspondence and papers, both as Professor of Natural Philosophy (Physics) at Columbia College and as a leading engineer. Many certificates of membership in honorary societies are included. There are letters from Washington Irving (1783-1859) to Prof. Renwick and to his mother, Jane Jeffrey Renwick, pertaining to contemporary events and Irving's own activities. The letters to Mrs. Renwick are about the travels and experiences of Irving and Renwick abroad. The collection also covers the affairs of the Prof. Renwick's grandfather, including documents concerning his land grants in New York State, and those of James Armstrong Renwick, including his valedictory address at Columbia College in 1876 and his class reunion in 1916. There are many legal documents, letters, and manuscripts of various members of the Renwick and Brevoort families; among these are Prof. Renwick's notes on his family genealogy and a memoir of Jane Jeffrey Renwick. Correspondents include Clement Clarke Moore, John A. Dix, Martin Van Buren, Secretary of State John Forsyth, and Secretary of the Navy James K. Paulding. There is one letter from Sir Edward Sabine (1788-1883), President of the Royal Society, giving his views on the American Civil War.

Correspondence, manuscripts, documents, financial records, photographs, memorabilia, and printed materials. The Foundation's correspondence files consist of letters from different organizations and foundations, including the Martin Luther King, Jr. Center for Social Change, The NAACP, the United Negro College Fund, the Studio Museum in Harlem, and the YWCA. Also included in this collection are community dialogues on race relations (1974-1975); proposed dialogues (1979) on such subjects as the Boy Scouts of America, Columbia University, and the National Council of Christians and Jews; and files on the Whitney M. Young Fellows Retreat Conferences (1980-1984). The collection contains many files on Ed Wilson's bust of Young (1991), including contracts and agreements, records of payments to Wilson, documents concerning the bust's placement in various locations, correspondence with Wilson (1983-1991), and miscellaneous photographs and pictures. The contributions files contain annual listings of contributions and records of contributions from the National Urban League, assorted organizations, corporations, individuals, foundations, and Philip Morris.

Correspondence, manuscripts, reports, slides, records, film and card files, and scrapbooks. The papers reflect Lindsay's various activities and are arranged in two sequences, an alphabetical name file and an alphabetical subject file. Since many of the subjects are closely related, the division between them is not always very sharp. Among the subjects covered are: social legislation, I.L.O., National Child Labor Committee, prohibition, labor, Republican National Committee, Institute for Social Research, League of Nations, humane legislation, housing, Harmon Foundation, Educational Radio Corporation, and the Bergh Foundation. Boxes 167-169 contain the files of the Committee for Industrial Relations, 1912-1914

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

Typescript copies of Louise R Loomis' translations of contemporary accounts of the Council of Constance, 1414-1418 (THE COUNCIL OF CONSTANCE; THE UNIFICATION OF THE CHURCH. Translated by Louise Ropes Loomis. Edited and Annotated by John Hine Mundy and Kenneth M. Woody. New York: Columbia University Press, 1961). These are not the accounts which constitute the text of the printed volume, but rather translations of other contemporary works made for her research, sometimes cited in the published "notes."

A collection of diaries and journals relating to Robinson's years at the University of Freiburg, where he took his doctorate, and to his subsequent European travels before his return to America. Also, several volumes bearing Robinson's marginal notes.

Papers of Robinson, covering his secondary and college education (1884-1895), his early positions as a high school principal (1895-1907), his academic post at University of Minnesota, and his first three months at Columbia University. Robinson's incoming correspondence includes some originals and carbon copies of his own letters, related papers, clippings, and memorabilia. The papers deal with a wide range of public affairs issues on the local, state, national, and international levels. Letters with federal officials and legislators, 1898-1907, include those of Senator Henry Cabot Lodge, concerning U.S. foreign policy in the Pacific Ocean, particularly the possible acquisition of the Caroline Islands. For the period 1907-1915, topics include charities, civic associations, U.S. tariff reform, and U.S. bank reform. Other letters relate to family, personal, and social matters; to academic posts, including letters of recommendation; to European trips as a delegate at the 1909 Darwin Centennial and the 1914 University of Leipzig's 500th anniversary; to membership in professional associations; to writings; to secondary education including offical reports while he was principal at St. Paul Central High School; and correspondence with other economists.