General view of laboratory technician Margaret Kreiser grating a sample of chocolate prior to testing at a Hershey Company facility. Per notations accompanying the photograph, testing included an analysis of the moisture present in a sample, as well as total fat and carbohydrate content.
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Perkin-Elmer Corporation. “Chocolate Sample Testing at Hershey Company Facility,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/d217qq50s.
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