The report discusses work performed between September 20 and October 31, 1943, under contract number OEMsr-674. Beckman reported beginning construction of the first model of an instrument to record concentrations of mustard gas (H).
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Beckman, Arnold O. “Monthly Report: An Instrument for Recording the Concentration of Mustard Gas in Air,” November 1943. Beckman Historical Collection, Box 18, Folder 31. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/h989r369j.
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