1950s Sinclair Oil Corporation advertisement originally printed in National Geographic. The advertisement features a black and white illustration of a petroleum refining plant as well as a molecular model demonstrating the crystal structure of a catalyst used in petroleum refining. The other side of the page has a color advertisement for the French Line.
Sinclair Oil Corporation. “Sinclair's Mighty Mover of Molecules,” 1950–1959. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/9s3j1z0.
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