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Subject Chocolate industry Remove constraint Subject: Chocolate industry

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    • 1970s

    General view of laboratory technician Margaret Kreiser using the heated graphite atomizer (HGA) attachment of a Perkin-Elmer Model 403 Atomic Absorption Spectrophotometer to test a chocolate sample for volatile elements…

    • 1970s

    General view of laboratory technician Margaret Kreiser using assorted Perkin-Elmer atomic absorption instruments at a Hershey Company facility to determine the metal constituents of finished food items and raw…

    • 1970s

    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…