See also: 1864 in science, other events of 1865, 1866 in science and the list of years in science.
Awards Copley Medal: Michel Chasles Wollaston Medal in Geology: Thomas Davidson Births Deaths August 26 - Johann Franz Encke, astronomer (* 1791) September 2 - William Rowan Hamilton, mathematician, physicist, and astronomer (* 1805)
