Produced in the 1960s, the DB-G was a single-beam grating (as opposed to a prism) ultraviolet spectrophotometer.
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Hesketh, Dean D. “Beckman Model DB-GT Ultraviolet Spectrophotometer,” 1960–1969. Beckman Historical Collection, Box 86. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/ms35t9138.
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