Portal:History of science/Selected anniversaries/August 2

August 2:

 * 1788 - Birth of Leopold Gmelin, German chemist (d. 1853)


 * 1790 - The first US Census is conducted


 * 1823 - Death of Lazare Carnot, French general, politician, and mathematician (b. 1753)


 * 1932 - The positron (antiparticle of the electron) is discovered by Carl D. Anderson


 * 1939 - Albert Einstein and Leó Szilárd write a letter to Franklin D. Roosevelt urging him to begin the Manhattan project to develop a nuclear weapon