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Spectrophotometer. June 1943.
Photographer unknown. Originally appeared at Figure VI in "The Development of a Spectrophotometric Carbon Monoxide Indicating
Instrument Using Hemoglobin," by Linus Pauling, National Defense Research Committee of the Office of Scientific Research and
Development, OSRD No. 1885, June 1943. Original caption reads: "The apparatus is shown with absorption cell in position in
the optical path. When not in use, the cell is stored in the lower compartment of the case. In addition to the above apparatus,
a six volt storage battery is required to supply power for heaters and lamp."
Associated: Linus Pauling Pauling
Date: June 1943
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