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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

Transcripts of pre-trial interrogations, mostly conducted by Miller, and statements taken under oath for the Nuremberg Trials relating chiefly to the indictment against I.G. Farbenindustrie. These interrogations and statements concern industrial productions, 1930-1945, the Four-Year Plan, mobilization, propoganda, intelligence organizations, connection with the Nazi Party, slave labor, and concentration camps, especially Auschwitz. They do not represent a complete record of the investigation and indictment of I.G. Farben.

The material in this collection was originally housed in binders in Barney Rosset's New York apartment, and cover his personal and professional endeavors as a radical publisher, intellectual, and overall man of letters. It consists of writings, letters, photographs, interviews, films, catalogs, publishing files related to both Grove Press and Evergreen Review, and extensive biographical information on Rosset. The entire collection has been rehoused into archival quality boxes and folders. Each binder had been labeled, generally with some sort of topical or chronological designation. In most cases the binder labels will be retained as file titles, and the subdivisions within binders have become folders and retained, to a great extent, the titles assigned to them by the creator. In some cases the staff of the RBML altered or elaborated on existing folder titles for general clarity and ease of research. In some cases, the collection contains both original and typed (or transcribed) copies, the latter often taking the form of computer printouts that were originally held in binders marked "Master" or "Master Disk" to indicate their contents were on computer disks. These original binder titles have been kept throughout the finding aid.

Arranged by location and address, the collection consists of appraisal reports, pamphlets, broadsides, financial communication, plans, diagrams and occasionally photographs for prospective or acquired Durst Organization properties. Two linear feet of files are for properties outside of New York City.

The Packer collection contains 64,000 items from the files of this American diplomat. It is complete in its representation of every aspect of his life. The papers include personal and professional correspondence, manuscripts, documents, printed materials, and Russian cartoons and illustrations, as well as original World War I posters. It also contains an array of photographs taken by Mr. Packer between 1917 and 1923, which depict scenes from the Russian Revolution and from Russian city life.

Drafts and manuscripts of Pickering's short stories, articles, and books including 1001 QUESTIONS ANSWERED ABOUT ASTRONOMY, THE STARS ARE YOURS, FAMOUS ASTRONOMERS, ASTERISKS, CAPTIVES OF THE SUN, MEN SPACE AND THE STARS, and WINDOWS TO SPACE. The files also contain correspondence relating to these works.

Papers covering Mayer's literary activities from approximately 1954-1983 and his versatile interests in music and recordings, the financial world, the advertising business, the legal profession, and public education. The collection includes his notes, interviews, drafts, manuscripts, typescripts, proofs, reviews, correspondence, and clippings for THE SCHOOLS; THE LAWYERS; MADISON AVENUE, U.S.A.; EMORY BUCKNER; DIPLOMA; WHERE, WHEN, AND WHY: SOCIAL STUDIES IN AMERICAN SCHOOLS; as well as several hundred essays published in ESQUIRE, HORIZON, the SATURDAY EVENING POST, and other magazines. Also, material dealing with Mayer's books on banking, television, music, and housing, and with his continuing interest in education and the New York City school system; and diplomacy and his Sloan Foundation study on cities and universities.

This collection consists of deeds from various land transactions and gifts of property from donors to Columbia University.