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    • circa 1900

    Portrait of Henry Heide (1846-1931), known in his time as the dean of American candy manufacturers. A native of Germany, Heide immigrated to the United States in 1866 and ran a retail grocery store in Pittsburgh before…

    • circa 1900

    Portrait of Herbert H. Dow (1866–1930), founder of Dow Chemical Company.

    • circa 1900

    Portrait of Dmitri Ivanovich Mendeleev (1834-1907), best known for his discovery of periodic law and creation of the periodic table of elements.

    • circa 1900

    Portrait of William Francis Hillebrand (1853-1925). Hillebrand was born in Honolulu, Hawaii on December 12, 1853, the son of renowned botanist William Hillebrand (1821-1886). William Francis Hillebrand studied at…

    • circa 1900

    Portrait of Charles Frederick Chandler (1836-1925), an industrial chemist whose research concerning sugar refining, gas manufacturing, and chemical education greatly impacted public sanitation and health.

    Charles…

    • 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…

    • circa 1907

    Portrait of Marston Taylor Bogert (1868-1954), American Chemical Society President (1907-1908) known for his work on the synthesis of heterocyclic compounds, dyes, pharmaceuticals, and perfumes.

    Marston Taylor Bogert…

    • circa 1910

    Portrait of Isaac Ott (1847-1916). Ott was born in Northampton County, Pennsylvania on November 30, 1847 and graduated from Lafayette College (class of 1867). Ott went onto study medicine at the University of…

    • circa 1910

    Portrait of Jokichi Takamine (1854-1922). The son of a doctor, Takamine graduated from the College of Science and Engineering of the Imperial University of Tokyo in 1879 and, with support from the Japanese government,…

    • 1910s

    Portrait of Milton Whitney (1860-1927), Chief of the Division of Agricultural Soil (later alternately known as the Division of Soils and/or Bureau of Soils), a partner in the National Cooperative Soil Survey (NCSS).…

    • 1910s

    Portrait of P.B. (Philip Bridges) Sadtler (1884-1964), chemical engineer and son of charter member and first President of the American Institute of Chemical Engineers (AIChE) Samuel Phillip Sadtler (1847-1923).

    • 1910s

    Portrait of Edgar Fahs Smith (1854-1928), a chemist and educator best known for his association with the University of Pennsylvania and the Edgar Fahs Smith Memorial Collection in the History of Chemistry.

    Edgar Fahs…

    • 1910s

    Group portrait of chemist and educator Edgar Fahs Smith (1854-1928) and University of Pennsylvania students posed in front of what is believed to be the Harrison Chemical Laboratory building. Over the course of his…

    • 1910s

    Portrait of American chemist Edward Goodrich Acheson (1856-1931), inventor of the Acheson process to synthesize graphite and silicon carbide and later a manufacturer of carborundum and graphite.

    Edward Goodrich Acheson…

    • 1910s

    Portrait of Herman Frasch (1851-1914), a chemist and engineer best known for his work in the petroleum industry.

    Herman Frasch was born on December 25, 1851 in Gaildorf, Germany. Frasch was schooled at the Gymnasium in…

    • 1910s

    Portrait of American chemist Martin Hill Ittner (1870-1945), one of the first chemists in the United States to develop successful methods for the hydrogenation of fatty oils, which helps turn liquid oils into solids.

    • 1910s

    Portrait of Samuel Phillip Sadtler (1847-1923), a charter member and first President of the American Institute of Chemical Engineers (AIChE).

    Samuel Philip Sadtler was born on July 18, 1847 in Pine Grove, Schyulkill…

    • 1910s

    Portrait of Samuel Schmucker Sadtler (1873-1954), graduate of the Massachusetts Institute of Technology and son of charter member and first President of the American Institute of Chemical Engineers (AIChE) Samuel…

    • circa 1910

    Portrait of Arthur Dehon Little (1863-1935), a pioneer of chemical engineering practice and principles who helped establish chemical engineering as a separate profession with a distinct approach and training method.

    A…

    • circa 1915

    Portrait of Pierre Samuel du Pont (1870-1954), President of the the E.I. du Pont de Nemours & Company (1915-1919) and a member of the Board of Directors. A graduate of the Massachusetts Institute of Technology, he also…

    • circa 1916

    Portrait of Albert Edward Marshall (b. 1883). A native of Liverpool, England, Marshall studied at the Liverpool Institute (1898-1900) and Liverpool University College (1900-01). In 1902, Marshall joined the United…

    • circa 1916

    Portrait of John Van Nostrand Dorr (1872-1962). In partnership with John Lundberg and A.D. Wilson, Van Nostrand Dorr owned the Lundberg, Dorr, & Wilson gold & silver mining operation in Terry, South Dakota. In 1916, he…

    • circa 1917

    Portrait of William H. Walker (1869-1934), a pioneer of chemical engineering practice and principles in the United States.

    William H. Walker was born in Pittsburgh, Pennsylvania in 1869 and graduated from Penn State…

    • circa 1919

    Portrait of Irénée du Pont (1876-1963), chemical engineer and President of the the E.I. du Pont de Nemours & Company (1919-1926).

    • 1920s – circa

    Portrait of Samuel Cox Hooker (1865-1935). Hooker was born on April 19, 1865, in Benchley, Kent, England and studied at the Government Science School in South Kensington, London. Hooker earned his PhD from the…