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    • 1901 – before 1928

    General view of an employee operating an apparatus used to study ammonia at the Bureau of Chemistry's Nitrogen Laboratory. Part of the U.S. Department of Agriculture, the Nitrogen Laboratory conducted investigations…

    • 1901 – before 1928

    General view of two employees working in the Bureau of Chemistry's Oil, Fat, and Wax Laboratory, with view of assorted laboratory glassware and apparatus. Part of the U.S. Department of Agriculture, the Oil, Fat, and…

    • 1901 – before 1928

    General view of an employee utilizing an apparatus in the Bureau of Chemistry's Dust Laboratory. Part of the U.S. Department of Agriculture's Office of Development Work, the Dust Laboratory conducted research into the…

    • 1904

    Portrait of Ira Remsen (1846-1927). Along with Constantin Fahlberg, Remsen discovered the artificial sweetener saccharin in 1879.

    A native of New York City, Remsen received his M.D. from the Columbia University…

    • after 1905 – before 1920

    Elevated view of the exterior of the American Vanadium Company (later the Vanadium Corporation of America) plant facilities in Bridgeville, Pennsylvania. The Bridgeville chemical and metallurgical plant was used to…

    • after 1905 – before 1920

    Elevated view of the exterior of the American Vanadium Company (later the Vanadium Corporation of America) plant facilities in Bridgeville, Pennsylvania. The Bridgeville chemical and metallurgical plant was used to…

    • after 1905 – before 1920

    General view of a furnace used to smelt ore at the American Vanadium Company (later the Vanadium Corporation of America) plant facilities in Bridgeville, Pennsylvania. The Bridgeville chemical and metallurgical plant…

    • after 1905 – before 1920

    General view of stockpiles of ore at the American Vanadium Company (later the Vanadium Corporation of America) plant facilities in Bridgeville, Pennsylvania. The Bridgeville chemical and metallurgical plant was used to…

    • circa 1905

    General view of a portion of the Dearborn Drug and Chemical Works hospitality suite located at Young's Million Dollar Pier in Atlantic City, New Jersey. Dearborn maintained a permanent hospitality suite at the pier to…

    • circa 1905

    General view of a portion of the Dearborn Drug and Chemical Works hospitality suite located at Young's Million Dollar Pier in Atlantic City, New Jersey. Dearborn maintained a permanent hospitality suite at the pier to…

    • circa 1905

    Exterior view of a portion of Young's Million Dollar Pier in Atlantic City, New Jersey, with a sign for "Dearborn" visible over a striped awning. Per notations accompanying the photograph, Dearborn Chemical and Drug…

    • circa 1905

    General view of a portion of the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of furnaces, assorted balances, and…

    • circa 1905

    Close-up view of the bucking board and crusher used to prepare coal and ore samples for analysis at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in…

    • circa 1905

    Close-up view of the assay and combustion furnaces in the laboratory back room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois.…

    • circa 1905

    General view of the drug storage room 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 1905

    General view of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and scientific…

    • circa 1905

    Close-up view of assorted scientific instruments, including microscopes and balances, used at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago,…

    • circa 1905

    View of a portion of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. Per notations accompanying the photograph, the…

    • circa 1905

    General view of the main office space at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. Per notations accompanying the photograph,…

    • circa 1905

    View of a section of the office space 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 1905

    General view of a section of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and…

    • circa 1905

    General view of the office of Dearborn Drug and Chemical Works (later Dearborn Chemical Company) President William H. Edgar at the company's 35th Street laboratory facilities located in Chicago, Illinois. Founded in…

    • circa 1905

    View of a section of the office space 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 1905

    General view of the office of G.M. Eddy (Secretary) at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. Founded in 1887, the Dearborn…

    • circa 1905

    View of a section of the office space 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…