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Subject Postage stamps Remove constraint Subject: Postage stamps Subject Commemorative postage stamps Remove constraint Subject: Commemorative postage stamps

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    • 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.

    • 1963-Nov-21

    Stamps depict Niels Bohr, the equation for the Bohr frequency condition (an equation relating to light frequency and electrons), and a diagram of the Bohr model of a hydrogen atom.

    • 1967

    Depicts Wilhelm Conrad Röntgen, awarded the first Nobel Prize in Physics for the discovery of X-rays, along with an X-ray tube and an atom.

    • 1975

    Stamp issued during International Women's Year (1975), depicting Marie Curie, "discoverer of radium," by the former British colony Saint Christopher-Nevis-Anguilla (now called the Federation of Saint Kitts and Nevis.)

    • circa 1961

    Stamp from the inauguration of Democritus Nuclear Research Centre in Agia Paraskevi. Depicts ancient Greek philosopher Democritus and a model of an atom.

    • 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.

    • 1922 – 1936

    Nine small postage stamps in various denominations issued in commemoration of the 100th anniversary of the birth of Louis Pasteur in 1922. The large semipostal stamp was issued in 1936 and includes a surtax for the…