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Perrin, Jean Baptiste (1870–1942)

Jean Baptiste Perrin
Jean Perrin was a French physical chemist who was awarded the 1926 Nobel Prize in Physics for work on the structure of matter and for his studies of cathode rays and Brownian motion in which, by examining colloidal particles, he was able to arrive at a good value of the Avogadro number. Perrin wrote several books, including The Elements of Physics (1930).

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