Also known as the DK-2 Spectrophotometer, this model covered ultraviolet, visible, and near-infrared spectral ranges. These men are likely part of the team that designed the instrument.
|Place of creation|
|View in library catalog|
Dietrich, T. A. “Unidentified Men with Beckman Ratio Recording Spectrophotometer,” circa 1966. Beckman Historical Collection, Box 55, Folder 63. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/b5644r55p.
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