General view of an unidentified chemist checking the graphical read-out of a Perkin-Elmer infrared spectrometer in use at the Atlanta laboratory of Optimal Systems, Inc. Per notations accompanying the photograph, the spectrometer is being used in conjunction with atomic absorption spectroscopy to "fingerprint" extraneous contents of lube oil sample taken from automotive construction equipment and aircraft systems in order to determine engine-wear factors.
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Perkin-Elmer Corporation. “Perkin-Elmer Infrared Spectrometer in Use at Optimal Systems, Inc. Laboratory,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 6. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/cj82k824r.
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