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Correspondence, manuscripts, notes, clippings, and photographs of or relating to Cardozo, including his lecture notes as a student at Columbia, 1885-1889, and his commonplace books. Also, four boxes of printed and manuscript material collected by George S. Hellman while writing BENJAMIN N. CARDOZO, AMERICAN JUDGE; and photocopies of letters, manuscripts, and notebooks of original Cardozo papers in the Cardozo School of Law Library. Materials re. his estate and will have been added.

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, 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.

A collection of letters, documents, manuscripts, and books collected by Dr. Michael Reynard and placed on deposit in The Rare Book and Manuscript Library.

The collection includes two diaries of his American tour (one is made up of his rough travel notes, the other is in edited form for circulation), a memorial volume of manuscripts about his wife (Ann Loxley Rhees) prepared by his daughter Eliza (Mrs. Nicholas Murray), and 1851 passport of Nicholas Murray, a letter of Thomas Chalmers Murray to his sister Mary Jones Murray Butler (the mother of Nicholas Murray Butler, President of Columbia University), correspondence between Welsh historian Gwyn A. Williams and collection donor Mary Butler Brown, an essay entitled "Morgan John Rhees and Beula" by Gwyn A. Williams, Ann Loxley Rhees's valedictory oration on graduation from Philadelphia's Ladies Academy, an address on female education ca. 1789, family obituary clippings, poems, misc. items, and a photograph of Ann Loxley Rhees. An edited version of substantial sections of the diaries of M.J. Rhees was published in John Thomas Griffith's 1910 biography and miscellany of Rhees and his family, a copy of which is included in this collection. An edited version of a previously unpublished section of the diary, from May 2nd to July 9th 1795, was published in Northwest Ohio History (vol. 80, no. 2), but it is an unreliable transcription containing many inaccuracies, according to Dr E. Wyn James of Cardiff University, who is working on a new edition of the M.J. Rhees diaries.