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The collection consists of 8 photographs of documents and 2 books. The documents, which include patents (gramoty) and decrees (ukazy), date from 1707-1812. There is also an almanac"Pami︠a︡tnai︠a︡ knizhka" dated 1855; and "Pami︠a︡tnai︠a︡ knizhka Lit︠s︡eĭstov za rubezhom" (Paris, 1929).

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).

Letters, manuscripts, and documents of the Bruce family concerning the business affairs of the George Bruce & Company Type Foundry of New York City. There are seven letters of David Bruce, Jr., his biography of David Bruce, Sr., and other manuscripts and letters concerning his invention of the first successful type-casting machine as well as the patent agreements for the invention. Also, a group of ten letters from Thomas N. Rooker of the NEW YORK TRIBUNE to David Wolfe Bruce (1824-1895). There are several letters which relate to George Bruce (1781-1866), the founder of Bruce Type Foundry, as well as his manuscripts on printing and related fields. The collection also contains material relating to the Bruce entry in the Paris Universal Exposition of 1867, the financial records of the firm, miscellaneous correspondence with other printers, and type specimens. In addition, there is a scrapbook of memorabilia containing clippings, receipts, typographic magazines, and specimens of printing.

Correspondence and legal files kept by Judge Edmund L. Palmieri having to do with the case brought by Brumbaugh, Free, Graves & Donohue, representing Esther Marion Armstrong, against Emerson Radio for patent infrigment.

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 and professional correspondence, including 25 long letters from Professor Henry F. Herbig; manuscripts (mainly speeches); specifications for patents in electrical fields; technical and personal photographs; and memorabilia. Included is a copy of the famous "shot in hand" x-ray photograph, ca. 1896, one of the first ever to be taken. This collection also contains the correspondence, manuscripts, documents, and memorabilia of Professor Pupin's daughter, Varvara Smith, and his son-in-law, Louis Graham Smith. His daughter's letters and documents deal with her financial difficulties, her administration of Pupin's estate and her claims against Columbia University. Louis G. Smith's letters deal with his anti-Communist sentiments and his manuscripts are mainly ideas for popular songs and plays. There are three letters (photostatic copies) to Smith from Dwight D. Eisenhower.

Correspondence of Nikola Tesla and Robert Underwood Johnson include letters of Tesla to Johnson's wife and daughter, clippings, photographs, and miscellaneous materials. Letters to George Scherff, 1902-1930, and others, manuscripts, printed articles, patents, and brochures. The material is of a technical nature and the letters deal primarily with Tesla's work on transformers, turbines, steam and gas oscillators, compressors, pumps, induction motors, and wireless transmitters. Also, printed materials by and about Tesla, including DR. NIKOLA TESLA BIBLIOGRAPHY (1979) by John T. Ratzlaff and Leland I. Anderson; and published selections from diary entries, correspondence, patents, and patent wrappers by Tesla published by the Tesla Book Company. There is also a videotape cassette "Nikola Tesla the Genius Who Lit the World".

Correspondence, manuscripts, typescripts, conference papers, scientific drawings, photographs, and printed material. This collection consists chiefly of Halford's manuscripts and typescripts of his writings for scientific journals and papers presented at various conferences and symposiums with related correspondence of colleagues. Also included are files on the teaching of chemistry with reference to practices at Columbia, photographs of his spectrometers, a copy of his patent for Recording Spectrometers, and a file relating to his participation in a 1959 panel discussion on the future of education sponsored by the Barnard College and Columbia Alumni Clubs of Chicago. The printed material includes reprints and accompanying bibliography of Halford's writings. Also, a photograph taken by Jack Aeby at the test site of the atomic bomb, Alamogordo, N.M., 16 July 1945 has been added to the collection.