General view of an unidentified chemist examining the graphical output of a Perkin-Elmer Model 621 Grating Infrared Spectrophotometer in use at the Federal Drug Enforcement Administration's Special Testing and Research Laboratory located in Washington, D.C. Per notations accompanying the photograph, the instrument is being used to analyze the components of a drug sample for use as forensic evidence in an investigation.
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Perkin-Elmer Corporation. “Perkin-Elmer Infrared Spectrophotometer in Use at Federal Drug Enforcement Administration,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 6. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/vm40xs55h.
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