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Architectural drawings for buildings designed by Hamlin including proposed alterations for the Charles Dudley Warner House, circa 1885; pumping station Clear Stream (or Clear Stream Station), Long Island, 1886; American Classical School, Athens, Greece, 1886-1888; proposed cottage for Mrs. R. Hoe at Sea Cliff, Long Island, 1887; an addition to Clinton Hall at Blair Presbyterian Academy, Blairstown, New Jersey, circa 1896; Soldier's Monument, Whitinsville, Massachusetts, circa 1904 (Hamlin was the architect and Herman A. MacNeil was the sculptor); and miscellaneous and unidentified structures. Also included are drawings done by Hamlin while a student at the Massachusetts Institute of Technology, 1876-1877; sketches done by Hamlin on travels both in the United States and abroad, 1867-1923; photographs of various unidentified buildings and architectural drawings; manuscripts of "ARCHITECTURAL SHADES AND SHADOWS" with related drawings"History of American Art" (unfinished, in French), circa 1923, and "MODERN ARCHITECTURE AND THE CRITICS" circa 1923. Personal materials included undated photographs of A.D.F. Hamlin; a photograph of an 1835 portrait of Cyrus Hamlin; a volume containing condolences, 1926, on the occasion of A.D.F. Hamlin's death; and a scrapbook"Memoirs of Amherst, Class of '75" containing programs, invitations, clippings, notes, essays, exam questions, steamship passenger lists, and other materials.

Approximately 12,000 letters to Allan Nevins from various correspondents including James Truslow Adams, Franklin Delano Roosevelt, Harry S. Truman, Willa Cather, Frances Folsom Cleveland, Van Wyck Brooks, Robert Frost, Newton D. Baker, Archibald MacLeish, John D. Rockefeller, Jr., Carl Sandburg, and Henry Wallace; notes and typescripts for Nevins' books including Emergence of Lincoln, The Ordeal of Democracy, Rockefeller, and History and Historians, with notes by editor Ray A. Billington; miscellaneous transcripts, clippings, newspapers, and photographs. Also, autograph letters and manuscripts by presidents, Civil War figures, financiers, politicians, and authors. There are also the Brand Whitlock World War I Diaries and letters to him by such people as Herbert Hoover, Gen. John J. Pershing, and others.

Correspondence, sermons, Hebrew-English lexicon, research notes, scrapbooks of clippings, letters copied into journals by Emilie Grace Briggs, books, pamphlets, Bibles, University of Virginia papers, University of Berlin papers, Union Theological Seminary papers, material relating to the Presbyterian Church, articles and miscellaneous. Also included is heresy material relating to Briggs' trial before the Presbytery of New York, 1892, and record of trial proceedings.

Correspondence, memoranda, reports, etc.

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

Correspondence, manuscripts and documents. Included among his personal and professional correspondence are letters from famous economists collected by Seligman. Among these are: I) William Shirley (Box 95). 1741-1745. Copies of letters and documents by Shirley, Royal Governor of Massachusetts, addressed chiefly to the Board of Trade, London; II) Paul Flobart (Box 96). RECHERCHES SUR LES BILLETS DE LA BANQUE DE LAW, 1716-1720. Lille, 1920. Notes, page proof and printed for of this pamphlet; III) John Francis Bray Papers (Box 97). Bray, 1809-1895, early socialist writer and labor agitator in England, 1822, returned to America in 1842. Michigan experiences, 1842-1896, papers 1860-1890; IV) Ernest Jones Papers. Correspondence, family and business papers of Ernest Jones, 1819-1869, English militant socialist and leader of the Chartist movement, and publisher of two newspapers propagating Marxist doctrines. Collection consists of ca.1,708 items, and some family correspondence and mementoes. The most valuable part appears to be his notes refuting various libel charges brought against him. In 10 boxes at the end of the collection

Correspondence, manuscripts, memorabilia, photographs, and printed materials. The correspondence consists of letters relating to the publication and review of Jäckh's books, articles, and book reviews and typescript copies of letters by Hans Jäckh. There are manuscripts for his articles, lectures and speeches as well as clipping files of book reviews and articles by and about Jäckh in the European and North American press. The bulk of the collection is written and printed in German and deals with the Balkans and the Near East before 1920, including the Balkan War of 1912-1914, and the Turkish Revolution. Of particular interest are manuscripts and articles describing his land travels between 1903 and 1913 with the German fleet and on hot air balloons. Other topics covered include the Hocjschule für Politik, German labor unions, German-European relations, European attitudes towards the United States, and his literary works. There are also some manuscripts dealing with the Balkans and the Near East during World War II. An extensive file of photographs depicts, Albania, Asia Minor, Baghdad, the Balkans, Constantinople, Genoa, the German naval fleet, the Hochschule für Politik, hot air balloons, Italy, the Mediterranean, Turkey, the Turkish Revolution, the United States, Versailles, and Weimar. There are books from Jäckh's library, some with marginal notes, some signed and inscribed to him as well as copies of his own works.

The main body of this collection contains letters from Carpenter to Robert W. Herrick (1868-1938), a student of his at Harvard from 1888 to 1890, and later a colleague on the Massachusetts Institute of Technology faculty, 1890-1893. At this time Herrick went to teach at the University of Chicago and Carpenter came to Columbia. Much of this correspondence is concerned with helping his friend Herrick break into the professional writers' world. Items of personal interest are also discussed in these letters to a long-time friend. Three early letters, 1886-1888, are written to his mother from Paris and Berlin where he spent the two years of the Rogers Fellowship upon his graduation from Harvard in 1886. More descriptive than personal, they tell his impressions of these countries and news items of the day. In addition there is an 11-page manuscript by Carpenter entitled "My Impressions of France" written ca. 1888. There is also a scrapbook of clippings from newspapers and magazines of writings by Carpenter from 1892 to 1905. Included are book reviews, literary writings and some items relating to Columbia University.

Correspondence, sermons, addresses, lecture notes, articles, scrapbooks, Religious Freedom Committee, House Un-American Activities Committee.