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

Personal correspondence, speeches, subject files, photographs, and printed and miscellaneous material of Hogan. The correspondence, speeches, and other material relate primarily to his activities as District Attorney, and to his unsuccessful campaign for the U.S. Senate, 1958. The papers also reflect Hogan's deep concern for Columbia University, as a Trustee and a member of numerous alumni committees. Among the major correspondents are Harry J. Carman, Dwight David Eisenhower, Robert F. Kennedy, Arthur Hays Sulzburger, and Herbert Bayard Swope.

The records include annual reports, board minutes, budgets, by-laws, correspondence, memos, publications, reports, scrapbooks, photographs and printed material. They document the settlement and its antecedent institutions from 1854 to 1994, offering a unique view of the first wave of the settlement house movement in America, as well as related philanthropy and social welfare activities in New York City over a 140 year period. The origins of Goddard-Riverside Community Center are documented in Series I, which includes eight institutional subseries. These records provide a wealth of information on philanthropic, social welfare and settlement work from the mid-19th century through the 1950s. Series II - IV document the activities of the settlement from 1959 to the 1990s, with a particular emphasis on the urban renewal period of the 1960s. Items in Series VII include photographs of staff, activities, facilities of Goddard-Riverside Community Center, as well as several of its predecessor institutions.

Correrspondence, manuscripts, notes, memoranda, documents, photographs and printed materials. In addition to personal correspondence and documents, there are files of Amnesty International, the human rights organization of which Morris was American Section chairman. Also included are notes and manuscripts of Morris' studies in Japanese literature and culture, particularly relating to his many books and translations. His interest in puzzles, and compilations of several volumes of them, are reflected in notes and correspondence. Among the major correspondence are Donald Keene, Anthony Powell, Sacheverell Sitwell and Arthur Waley

Correspondence, manuscripts, notes, diaries, documents, photographs, audio tape recordings, printed materials, scrapbooks, and sketches and drafts of portraits. Her finished portraits on ivory are cataloged separately for the Art Collection (q.v.). The collection includes her correspondence with friends and clients; manuscripts of her articles, lectures, and many unpublished autobiographical drafts; pencil sketches, watercolor drafts, and photoprints of her portraits on ivory; photographs of her family amd travels; clippings and other printed materials; and three scrapbooks of clippings and memorabilia. There is cataloged correspondence from Arnold Genthe, S.I. Hayakawa, Karen Horney, Burges Johnson, Dwight Macdonald, and Alice B. Toklas, etc.

Correspondence, manuscripts, playscripts, screenplays, diaries, documents, contracts, financial records, photographs, phonograph records, motion pictures, playbills, posters, sheet music, cartoons, art work, memorabilia, scrapbooks, and printed materials. . The collection consists chiefly of correspondence and production files relating to the creation, production, and performance of their works for stage, screen, radio, and television, such as Leave It To Me and Kiss Me Kate (with music by Cole Porter), Boy Meets Girl, and My Three Angels. Correspondence (with twentieth century authors, playwrights, musicians, political figures, and actors) includes: George Abbott, Jean Arthur, Bennett Cerf, Katharine Cornell, Jo Davidson, George and Ira Gershwin, Alec Guinness, W. Averell Harriman, Lilli Lehmann, Mary Martin, Laurence Olivier, Mary Pickford, Cole Porter, Regina Resnick, Eleanor Roosevelt, Robert E. Sherwood, Lincoln Steffens, Kurt Weill, Rebecca West, and Thornton Wilder. There is also correspondence concerning Bella Spewack's work with the New York Girls' Scholarship, UNRA, and the Sports Center of Israel. In addition to the production files, there are manuscripts and typescript drafts for novels, short stories, and articles by the Spewacks.

A large and important collection of the correspondence, memoirs, and plays of Tennessee Williams. The collection is especially strong in the later works.