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Subject Science on postage stamps Remove constraint Subject: Science on postage stamps Subject First day covers (Philately) Remove constraint Subject: First day covers (Philately) Date 1971 Remove constraint Date: 1971

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    • 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…

    • 1971

    Cachet includes two depictions of Lord Rutherford and text, "World Famous Scientist Pioneering in Radioactivity and Nuclear Physics." The research program in the field of radioactivity undertaken by Rutherford at…