Printed patents, reports and related material on his system for the radio control of torpedoes, inventions for musical instruments and scrapbooks of newspaper clippings and congressional publications about Hammond and his work. Half the collection is made up of clippings
The collection includes correspondence, articles, lab notebooks, musical scores, audio recordings, computer files, and other materials related to the professional work of computer music pioneer Max V. Mathews. Correspondents of note include Jean-Claude Risset and Pierre Boulez. Also included are several films by Lillian Schwartz with music by Mathews
Coloured, front and back elevations of kangaroo pouch machine. Details of method of playing are typed (l.r.) onto page, and parts labels are handwritten on diagrams. Front view illustrated 24-26 April 1952, rear view illustrated 26-27 April 1952
Photograph caption dated September 19, 1960 partially reads, "Scene at Sepulveda's Pacific Mercury electronics plant shows Helen Nessamare, 9339 Haskell Ave., Sepulveda, inspecting organ on assembly line. Company employes [sic] about 1,100 persons and produces electronic organs and hi-fi and TV sets.".