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Correspondence, manuscripts, a document, subject files and printed materials of Sack. The collection chiefly concerns American claims against Soviet Russia, and the currency of Estonia and other successor states. The collection contains a 1928 document signed by George F. Kennan. The manuscripts include essays and memoranda concerning currency exchange, tax laws and a number of American court cases involving financial affairs immediately after the 1917 revolution. There are subject files relating to diplomatic claims concerning debts, and the Soviet-Estonian peace conference of 1920. Among the printed materials are clippings and various American statutes and laws.

Papers and correspondence including letters from leading intellectuals of the United States and Europe. Much of this correspondence pertains to the publication and critical discussion of his two influential works, MANHOOD OF HUMANITY : THE SCIENCE AND ART OF HUMAN ENGINEERING (1921) and SCIENCE AND SANITY : AN INTRODUCTION TO NON-ARISTOTELIAN SYSTEMS AND GENERAL SEMANTICS (1933).

The bulk of the Motley papers document her professional life. The papers include correspondence, manuscripts, memoranda, speeches, interviews, photographs, audio cassettes, and memorabilia.

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, administrative, political, and investigative files of Nickerson. The papers deal almost entirely with his eight years as County Executive, and consist of correspondence, memoranda, manuscripts of speeches, notes, press releases, photographs, and clippings. Among the major correspondents are James A. Farley, Hubert H. Humphrey, Robert F. Kennedy, Edward I. Koch, and Percy E. Sutton. The Investigation Files, which amount to nearly half the collection, document investigation into corruption and mismanagement in numerous Long Island businesses and governmental departments. These investigations, instigated and overseen by Nickerson, were carried out largely by the Commissioner of Accounts, Milton Lipson, and later by Samuel Greason, the first governmental ombudsman in the United States. These files consist primarily of memoranda, transcripts of hearings, payroll and financial accounts, notes, and tape recordings.