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    • circa 1952

    General view of an unidentified employee measuring the specific gravity of a specimen in the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory. Per an article in the August 1941 edition of…

    • circa 1952

    General view of an unidentified employee at work in the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory, with view of assorted laboratory equipment and apparatus. Per an article in the…

    • circa 1952

    General view of chemist Mark Wolf preparing a sample for analysis at the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory facilities. Per an article in the August 1941 edition of the Dow…

    • 1954

    General view of chemist Bernie Thiegs working with various specimens at the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory facilities. Per an article in the August 1941 edition of the

    • 1953-Mar

    General view of entomologist E.E. ("Gene") Kenaga at work in the storage room for grain insect cultures at the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory. Per notations accompanying…

    • 1941-Aug

    General view of chemist Bernie Thiegs preparing an insecticide intended to combat potato beetles at the Dow Chemical Company's Agricultural Chemical Research and Development Laboratory facilities. Per an article in the…

    • 1941-Aug

    General view of two employees at work in a Dow Chemical Company Agricultural Chemical Research and Development Laboratory facility. Per an article in the August 1941 edition of the Dow Diamond, the department was…

    • circa 1960-Jul

    General view of technician Mary Moffit using an infrared spectrophotometer to analyze a sample of the insect repellent Metadelphene in a laboratory at the Hercules Powder Company plant in Brunswick, Georgia. Per…

    • circa 1960-Jul

    General view of research assistant Evelyn Kieffer using a reactor flask to analyze an unidentified substance in a laboratory at the Hercules Powder Company plant in Brunswick, Georgia. One of two Hercules plants…

    • 1970s

    Close-up view of a sample being inserted into a Perkin-Elmer Model 900 Gas Chromatograph for analysis at an unidentified laboratory facility.

    • 1970s

    General view of two unidentified students operating Perkin-Elmer infrared spectroscopy equipment in the chemical analysis instrument laboratory at Broome Community College in New York State. Per notations accompanying…

    • 1970s

    General view of an unidentified chemist preparing a drug evidence sample for analysis by a Perkin-Elmer Infrared Spectrophotometer in the Columbus Police Department Crime Laboratory. Per notations accompanying the…

    • 1970s

    General view of associate engineer R. Mark Phelan preparing a sample of silicone resin for analysis by a Perkin-Elmer infrared spectrophotometer at IBM's Manufacturing Materials Analysis Laboratory located in San Jose,…

    • 1970s

    Close-up view of a sample being inserted into a Perkin-Elmer Model 735 Infrared Spectrophotometer in use at a General Instrument Corporation laboratory in Hicksville, New York. Per notations accompanying the photograph,…

    • 1970s

    General view of an unidentified chemist preparing an oil sample for analysis by a Perkin-Elmer Model 727 Infrared Spectrophotometer in a mobile laboratory for the Environmental Protection Agency's Oil and Hazardous…

    • 1985 – 1986

    General view of a Perkin-Elmer Model 6500 Inductively Coupled Plasma Mass Spectrometry system in use at an unidentified laboratory facility. The individuals visible in the photograph are identified as Dr. Lee Davidowski…

    • 1970s

    General view of Dr. Eva Wittgenstein inserting a sample into a Perkin-Elmer Model 621 Grating Infrared Spectrophotometer in use at a facility associated with the Laboratory Methods Research Section of the Environmental…

    • 1970s

    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…

    • 1970s

    General view of Dr. Giovanni Bigalli posed with a Perkin-Elmer Grating Infrared Spectrophotometer at an unidentified laboratory facility. Per notations accompanying the photograph, this spectrophotometer is being used…

    • 1970s

    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…

    • 1970s

    Two views of a sample being injected into the heated graphite atomizer (HGA) of a Perkin-Elmer atomic absorption spectrophotometer in use at the quality control laboratory of the General Instrument Corporation in…

    • 1970s

    General view of chemist Robert Potts inserting a programming card into the heated graphite atomizer (HGA) of a Perkin-Elmer atomic absorption spectrophotometer in use at the State of Virginia's Environmental Laboratory.…

    • 1970s

    Close-up view of a blood-serum sample being injected into a Perkin-Elmer gas chromatograph via a solvent-free sampler capsule in the analytical laboratory at the Yale-New Haven Medical Center. Per notations…

    • 1970s

    General view of an unidentified female technician inserting a sample of an organic solvent into a Perkin-Elmer gas chromatograph at a laboratory associated with the National Institute for Occupational Safety and Health…

    • 1970s

    General view of Senior Pollution Control Technician Tara Schultz inserting a stack gas sample via syringe into a Perkin-Elmer gas chromatograph in the pollution laboratory at a Bethlehem Steel Corporation plant in…