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Rights In Copyright Remove constraint Rights: In Copyright Subject Chemists Remove constraint Subject: Chemists Subject Commemorative postage stamps Remove constraint Subject: Commemorative postage stamps Subject Postmarks Remove constraint Subject: Postmarks

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    • 1973-Jun-10

    Cachet, semipostal stamp, and postmark depict Louis Pasteur. A semipostal stamp is a postage stamp issued to raise money for a particular purpose (such as a charitable cause) and sold at a premium over the postal value.

    • 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…

    • 1973-Jun-10

    Cachet, semipostal stamp, and postmark depict Louis Pasteur. A semipostal stamp is a postage stamp issued to raise money for a particular purpose (such as a charitable cause) and sold at a premium over the postal value.

    • 1971

    Cachet, semipostal stamp, and postmark feature a portrait of the chemist, François Auguste Victor Grignard. The cachet and stamp also depict the apparatus Grignard used to produce the Grignard reaction, a new method for…

    • 1966-Sep-07

    Friedrich August Kekule von Stradonitz was a German organic and theoretical chemist, whose most famous work was determining the structure of benzene. The FDC features Kekule on the cachet, a postmark depicting the…

    • 1958

    Cachet and stamp depict Claude-Louis Berthollet. Cachet includes text describing Berthollet's contributions to water purification.

  1. Postcard image is of Albert Edelfelt's "Pasteur Dans Son Laboratoire" [Pasteur In His Laboratory]. Semipostal stamp depicts Louis Pasteur. Stamp includes surtax for the relief of unemployed intellectuals. A semipostal…