TY - PCOMM DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable TI - Letter from Arnold O. Beckman to Arthur E. Freston ID - xs55mc755 AU - Beckman, Arnold O. DA - 1934/05/28/ YR - 1934 AV - Beckman Historical Collection, Box 1, Folder 17 VL - Beckman Historical Collection, Box 1, Folder 17 AN - Beckman Historical Collection, Box 1, Folder 17 UR - https://digital.sciencehistory.org/works/xs55mc755 AB - Arnold O. Beckman provides an overview of the vacuum film-coating process developed for Lee de Forest. The process successfully coated film with magnesium, lead, bismuth, aluminum, and silver. The letter is apparently addressed to de Forest's funding source. Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum tubes in the early twentieth century. His serial business ventures included work in radio, telegraphy, telephony, broadcasting, and film. KW - Celluloid KW - Metal coating LA - English ER -