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    • circa 1905

    General view of employees at work in the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. The employees are identified…

    • circa 1905

    Album containing 25 photographs depicting early facilities associated with Dearborn Drug and Chemical Works (later Dearborn Chemical Company) in Atlantic City, New Jersey and Chicago, Illinois. Founded in 1887, the…

    • circa 1905

    Close-up view of scientific apparatus used at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. Founded in 1887, the Dearborn Chemical…

    • circa 1910

    Photograph depicting male and female chemistry students in a laboratory at an unidentified school or college. The students are grouped around several laboratory stations and are seen using test tubes and Bunsen burners…

    • 1910

    General view of two unidentified individuals seated at a laboratory bench in the so-called "chemistry room" at Park College (later Park University) located in Parkville, Missouri. Assorted laboratory glassware,…

    • 1913 – before 1928

    Close-up view of a polarimeter housed in a constant temperature dark room at the Bureau of Chemistry's Carbohydrate Laboratory. Part of the U.S. Department of Agriculture, the Carbohydrate Laboratory analyzed the…

    • 1913 – before 1928

    General view of the Bureau of Chemistry's Carbohydrate Laboratory showing assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Carbohydrate Laboratory analyzed the physical and…

    • 1913 – before 1928

    General view of the Bureau of Chemistry's Carbohydrate Laboratory showing assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Carbohydrate Laboratory analyzed the physical and…

    • 1913 – before 1928

    General view of employees at work in the Bureau of Chemistry's Protein Investigation Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Protein…

    • 1914 – before 1928

    General view of employees at work in the Bureau of Chemistry's Pharmacognosy Laboratory. Part of the U.S. Department of Agriculture, the Pharmacognosy Laboratory supervised the manufacture and distribution of crude…

    • 1914 – before 1928

    General view of a female employee analyzing unidentified substances in the Bureau of Chemistry's Pharmacognosy Laboratory. Part of the U.S. Department of Agriculture, the Pharmacognosy Laboratory supervised the…

    • 1916 – before 1928

    General view of an employee in the Bureau of Chemistry's Phytochemical Laboratory using a distillation apparatus to concentrate the odorous constituents of apples and peaches. Part of the U.S. Department of Agriculture,…

    • circa 1917

    Exterior view of a chemical warfare research laboratory under construction at American University near Washington, D.C. American research concerning chemical warfare was initially organized under the Bureau of Mines,…

    • 1920s

    General view of an unidentified analytical apparatus and technician at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The Fixed Nitrogen Research Laboratory…

    • 1920s

    General view of an unidentified man, presumably a laboratory assistant, seated at a work bench while examining an unknown substance. While the setting of this photograph is also unidentified, the photo was donated along…

    • 1920s

    General view of an unidentified man, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus, including a microscope. While the setting of this photograph is also unidentified, the…

    • 1920s

    General view of an unidentified man, presumably a laboratory assistant, seated at a work bench with assorted scientific equipment and glassware. While the setting of this photograph is also unidentified, the photo was…

    • 1920s

    General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…

    • 1920s

    General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…

    • 1920s

    General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…

    • 1920s

    General view of an unidentified man, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. While the setting of this photograph is also…

    • 1920s

    General view of an unidentified woman, presumably a laboratory assistant, posed near a work bench with assorted scientific apparatus and glassware visible in the background. Notably, the photograph is printed as a…

    • 1920s

    General view of a laboratory bench with assorted glassware and scientific apparatus. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing address, and postage. While…

    • 1920s

    General view of a laboratory assistant, identified as "Mac May," posed at a work bench for mixed acid materials. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing…

    • 1920s

    General view of a laboratory assistant, identified as "Mac May," posed at a work bench for mixed acid materials. Notably, the photograph is printed as a postcard, with space reserved on the verso for a message, mailing…