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Double flask for demonstrating anaerobic fermentation

  • 1939 – 1967 (Date span attributed to photograph)

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Photograph of a double flask used by French biologist, microbiologist, and chemist Louis Pasteur (1822-1895) to demonstrate anaerobic fermentation, as displayed at the Pasteur Institute in Paris. Per notations accompanying the photograph, the flask of barley water visible in the background was prepared and pasteurized by Pasteur in 1860.

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  • 7.25 in. H x 7.5 in. W
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  • (Exhibition label accompanying photograph) "Pasteur's famous double flask for demonstrating "anaerobic fermentation." In the background is the flask of barley water prepared and pasteurized by Pasteur in 1860. It was protected from dust but not from air by its long neck. It is still sterile and unfermented!"
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  • Courtesy of Science History Institute

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  • Box 1

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Scientific Biography
Louis Pasteur

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Fisher Scientific (Firm), and Louis Pasteur. “Double Flask for Demonstrating Anaerobic Fermentation,” 1939–1967. Fisher-Pasteur Memorial Collection, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/d791sg323.

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