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Creator Beckman, Arnold O. Remove constraint Creator: Beckman, Arnold O. Place California--Los Angeles--Hollywood Remove constraint Place: California--Los Angeles--Hollywood Format Text Remove constraint Format: Text Rights In Copyright - Rights-holder(s) Unlocatable or Unidentifiable Remove constraint Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable

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    • 1936-Jul-02

    Lee de Forest discusses testing Beckman's film-coating process with antimony. A sample of antimony paper is included.

    • 1931-Sep-09

    The letter requests deliverables of 100 feet of silvered film, and two 10 foot pieces with a silver coating on emulsion film and clear stock.

    Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum…

    • 1931-Oct-09

    The letter discusses the "very nice results" of using new Eastman film and queries as to the possible effects of light upon silvering solution.

    Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum…

    • 1931-Oct-22

    De Forest inquires about Beckman's progress toward a chemical coating that might change in opacity or color, and details the "very fine and uniform quality" of silver coated film de Forest is able to produce.

    Lee de…

    • 1931-Nov-09

    In this letter, de Forest proposes a process that could replace halftone film.

    Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum tubes in the early twentieth century. His serial business ventures…