Main Page | See live article | Alphabetical index The year 1839 CE in science and technology See also: 1838 in science, other events of 1839, 1840 in science and the list of years in science. Table of contents 1 Biology 2 Chemistry 3 Exploration 4 Geology 5 Technology 6 Awards 7 Births 8 Deaths Biology Theodor Schwann proposes that all living matter is made up of cells Chemistry Carl Mosander discovers lanthanum Exploration James Clark Ross sets off on the first scientific expedition to survey Antarctica Geology Roderick Murchison names the Silurian period Technology January 9 - The French Academy of Sciences announces theDaguerreotype photography process Invention of the bicycle by Kirkpatrick Macmillan Invention of the fuel cell by William Grove Development of vulcanized rubber by Charles Goodyear Development of Babbitt metal by Isaac Babbitt Awards Copley Medal: Robert Brown Wollaston Medal: Christian Gottfried Ehrenberg Births February 11 - Josiah Willard Gibbs, theoretical physicist/chemist († 1903) April 12 - Nikolai Przewalski, explorer († 1888) Deaths April 8 - Pierre Prévost, physicist ( 1751) August 28 - William Smith , geologist (* 1769) September 29 - Friedrich Mohs, German mineralogist (* 1773) November 15 - William Murdoch, inventor and technician (* 1754) This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.