See also: 1840 in science, other events of 1841, 1842 in science and the list of years in science.
Mathematics Karl Weierstrass discovers but does not publish the Laurent expansion theorem Awards Copley Medal: Georg Ohm Wollaston Medal: Adolphe Theodore Brongniart Births January 28 - Henry Morton Stanley, explorer, journalist († 1904) February 2 - François-Alphonse Forel, pioneer in the study of lakes († 1912) February 4 - Clément Ader, engineer and inventor, airplane pioneer († 1926) February 24 - Carl Gräbe, chemist († 1927) March 6 - Marie Cornu, physicist († 1902) August 25 - Emil Theodor Kocher, 1909 winner of the Nobel Prize in Physiology or Medicine († 1917) Deaths September 9 - Augustin Pyrame de Candolle , botanist (* 1778) October 28 - Johann Arfvedson, chemist (* 1792)
