Main Page | See live article | Alphabetical index The year 1834 CE in science and technology. See also: 1833 in science, other events of 1834, 1835 in science and the list of years in science. Table of contents 1 Astronomy 2 Biology 3 Geology 4 Mechanics 5 Physics 6 Awards 7 Births 8 Deaths Astronomy Hermann Helmholtz proposes gravitational contraction as the energy source for the Sun Johann Heinrich von Mädler and Wilhelm Beer publish Mappa Selenographica, the most complete map of the moon up until that time Thomas Henderson appointed first astronomer-royal for Scotland Biology James Paget discovers in human muscle the parasitic worm that causes trichinosis Félix Dujardin proposes that single-cell animals should be classified in a group by themselves Geology The Triassic is named by Friedrich August Von Alberti for the three distinct layers of redbeds, capped by chalk, followed by black shales that are found throughout Germany and Northwest Europe, called the 'Trias' Mechanics Carl Gustav Jakob Jacobi discovers his uniformly rotating self-gravitating ellipsoids John Scott Russell observes a nondecaying solitary water wave (soliton) in the Union Canal near Edinburgh and uses a water tank to study the dependence of solitary water wave velocities on wave amplitude and water depth Physics Émile Clapeyron presents a formulation of the second law of thermodynamics Heinrich Lenz discovers Lenz’s law Jean-Charles-Athanase Peltier discovers the Peltier effect Michael Faraday publishes "On Electrical Decomposition" in the Philosophical Transactions of the Royal Society (in which Faraday coins the words electrode, anode, cathode, anion, cation, electrolyte, electrolyze). Awards Copley Medal: Giovanni Plana Births January 7 – Johann Philipp Reis, physicist, inventor († 1874) January 15 - Frederick DuCane Godman, lepidopterist, entomologist and ornithologist († 1919) January 17 - August Weismann, biologist († 1914) February 7 – Dmitri Mendeleev, chemist († 1907) February 16 – Ernst Haeckel, zoologist († 1919) March 17 - Gottlieb Daimler, engineer, automotive pioneer († 1900) April 30 - John Lubbock, naturalist and archaeologist († 1913) August 5 – Ewald Hering, physiologist († 1918) August 22 – Samuel Pierpont Langley, astronomer († 1906) December 15 – Charles Young, astronomer († 1908) Deaths February 16 – Lionel Lukin, inventor (* 1742) February 26 – Alois Senefelder, inventor (* 1771) August 7 – Joseph Marie Jacquard, inventor (* 1752) October 10 – Thomas Say, naturalist (* 1787) This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.