The DR was a double-beam ultraviolet spectrophotometer, designed for accuracy rather than speed. Lee Cahn's skit represents an effort to begin "selling accuracy," as noted in the attached memo from J. D. MacNamara. The skit was distributed to sales representatives, though they were advised not to use the combative style.
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Cahn, Lee, and J. D. MacNamara. “The Vindication of the DR,” April 16, 1954. Beckman Historical Collection, Box 14, Folder 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/4x51hj41s.
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