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    • 1978

    Stamp commemorating the Swedish chemist, Svante Arrhenius (1859-1927), whose portrait is featured on the stamp. Arrhenius is considered by some to be the father of physical chemistry and won the 1903 Nobel Prize in…

    • 1978

    Stamp on souvenir sheet depicting Max Planck, a rocket, and the planet Earth. Planck won the Nobel Prize in Physics in 1918 (the stamp incorrectly identifies his Nobel Prize as 1914). Max Planck is known as the father…

    • 1977

    Stamp depicts the launch of an Atlas rocket carrying a Mercury single-man spacecraft, Newton, the fabled apple, and a satellite (possibly NASA's first Orbiting Astronomical Observatory launched in 1966).

    • 1975

    Cachet depicts the wavelength of krypton-86, which was formerly used to define the meter from 1960 until 1983. A meter was defined during this time as the wavelength of the 605 nm (orange) spectral line of a krypton-86…

    • 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

    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…

    • 1972

    Stamp depicts French chemist and microbiologist Louis Pasteur, along with boy receiving rabies vaccination, livestock, and chemical apparatuses.

    • 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…

    • 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…