Search Results

• 
  Business correspondence

  Letter from L. H. Duschak to Arnold O. Beckman

  • 1935-May-03

  Duschak comments on the price of the pH meter (high, but in line with comparable instruments) and inquires whether or not the "acidimeter" could be sold again after his project is finished.

  Arnold Beckman invented his…

  • Addressee Beckman, Arnold O.
  • Author Duschak, L. H.
  • Subject Hydrogen-ion concentration--Measurement--Instruments, Scientific apparatus and instruments, Beckman Instruments, Inc.
• 
  Photographs, Portraits

  Portrait of John Van Nostrand Dorr (1872-1962)

  • 1930s

  Portrait of John Van Nostrand Dorr (1872-1962). In partnership with John Lundberg and A.D. Wilson, Van Nostrand Dorr owned the Lundberg, Dorr, & Wilson gold & silver mining operation in Terry, South Dakota. In 1916, he…

  • Subject Chemical engineering, Chemists, Portraits, Chemical engineers, Industrialists, Dorr, John Van Nostrand, 1872-1962
• 
  Photographs, Portraits

  Portrait of Leo Hendrik Baekeland (1863-1944)

  • After 1920 – 1944

  Portrait of Leo Hendrik Baekeland (1863-1944), inventor of Bakelite, the first fully synthetic plastic.

  • Manufacturer Underwood & Underwood
  • Subject Portrait photography, Inventors, Bakelite, Baekeland, L. H. (Leo Hendrik), 1863-1944, Plastics
• 
  Photographs, Portraits

  Portrait of Carroll A. Hochwalt (1900-1987)

  • 1930s

  Portrait of Carroll A. Hochwalt (1900-1987). Hochwalt worked as a chemical engineer for the General Motors Corporation before co-founding Thomas & Hochwalt Laboratories in partnership with Charles Allen Thomas in 1926.…

  • Subject Portrait photography, Hochwalt, Carroll A., 1900-1987, Portraits, Chemical engineers, Monsanto Chemical Company
• 
  Engravings, Prints, Portraits

  Professor Wohler

  • After 1840 – before 1940

  A half-length portrait of Friedrich Wöhler (1800–1882), a German chemist.

  • Artist Cook, Conrad
  • After L'Allemand, Conrad, 1809-1880
  • Subject Wöhler, Friedrich, 1800-1882