French physicist (1892-1987) known for his theory that matter has the properties of both particles and waves, who was awarded the 1929 Nobel Prize in Physics. ALS in French, one page both sides of a 4.75 x 3.5 Institut de France, Acadamie des Sciences stationery card, July 5, 1949. Untranslated letter in which de Broglie plans to forward a January edition of the Science Almanac. In fine condition.
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