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    • 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).

    • circa 1930

    Portrait of John Francis Queeny (1859-1933), founder of the Monsanto Company, and dog. A 30-year veteran of the nascent pharmaceutical industry, Queeny founded the Monsanto Company in St. Louis, Missouri in 1901.…

    • 1875

    An etching of a chemist watching over a distillation process. The apparatus being used includes a gas-fueled bunsen burner at far left heating liquids in glass retorts. The products of the distillation are being…

    • 1945

    Photograph of mathematical physicist and physical chemist Richard C. (Chace) Tolman seated in front of a global map. This photograph is believed to have been taken when Tolman was serving as a scientific advisor to…

    • 1930s – circa

    Portrait of George O. Curme, Jr. (1888-1976), popularly known as the father of ethylene and for his pioneering work on applications for by-products of petroleum processing.

    Born in Mount Vernon, Iowa on December 24,…

    • circa 1884

    Portrait of Adolf von Baeyer (1835-1917), recipient of the 1905 Nobel Prize in Chemistry.

    Johann Friedrich Wilhelm Adolf von Baeyer was born on October 31, 1835, in Berlin, Germany. As a student at the University of…

    • 1940s – circa

    Portrait of James A. Rafferty (1886-1951). Rafferty was born in Chicago, Illinois on May 4th, 1886 and studied engineering and chemistry at the Lewis Institute of Technology. Following his graduation from Lewis in 1908,…

    • 1930s – circa

    Portrait of Thomas Midgley, Jr. (1889-1944), an American engineer and chemist who discovered the effectiveness of tetraethyl lead as an antiknock additive for gasoline.

    Thomas Midgley, Jr. was born on May 18, 1889 in…

    • 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…

    • 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…

    • 1930s – circa

    Portrait of George O. Curme, Jr. (1888-1976), popularly known as the father of ethylene and for his pioneering work on applications for by-products of petroleum processing.

    Born in Mount Vernon, Iowa on December 24,…

    • 1939

    Portrait of DuPont chemist Joseph X. Labovsky (1912-2013), taken at the DuPont pilot plant in Seaford, Delaware during the early stages of nylon production and research.

    Joseph X. Labovsky was born in Kiev, Ukraine on…

    • 1947-Apr-09 – 1947-May-26

    Illustrated catalog for a Pasteur Exhibition at the Science Museum in South Kensington, England, April 9th through May 26th, 1947. Exhibition originally shown in Paris, France, with added contributions from the Wellcome…

    • 1973-Jun-10

    Semipostal stamps commemorating the 150th anniversary of the birth of Louis Pasteur. Includes two postmarks depicting Pasteur, with Pasteur also featured on the first day of issue cancel. A semipostal stamp is a postage…

    • 1950s – circa

    View of chemist George Wieczorek (left) and an unidentified chemist using a Geiger counter to measure ionizing radiation in radioisotopes at an unidentified U.S. Department of Agriculture facility. A box of…

    • 1950s – circa

    View of chemist George Wieczorek (right) and an unidentified chemist using a Geiger counter to measure ionizing radiation in an unknown substance at a U.S. Department of Agriculture facility. The U.S.D.A. commonly used…

    • 1950s – circa

    View of chemist William A. Jackson using a Gieger counter to examine a package at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and…

    • 1950s – circa

    View of chemist George Wieczorek removing a vessel from a Pereco kiln at an unidentified U.S. Department of Agriculture facility.

    • 1950s – circa

    George Wieczorek (right) and two unidentified chemists handling radioactive material at an U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…

    • 1950s – circa

    View of chemist George Wieczorek (right) using a Geiger counter to measure ionizing radiation in an unknown substance, likely soil or fertilizer, at an unidentified U.S. Department of Agriculture facility.

    • 1943 – circa

    Portrait of Sidney Dale Kirkpatrick (1894-1973). Kirkpatrick was born in Urbana, Illinois and received his B.S. from the University of Illinois in 1916. Following graduation, he served as a chemical adviser to the…

    • 1979

    Cachet depicts Otto Hahn's equipment and the nuclear fission of uranium atoms. Stamp shows Hahn's diagram of the splitting of the uranium nucleus. Hahn was the Nobel Prize Winner for Chemistry in 1944.