Julius Lothar Meyer 627059 222802815 2008-07-01T05:01:47Z Numbo3-bot 7118326 robot Adding: [[gd:Lothar Meyer]] {{Infobox Scientist |name = {{PAGENAME}} |box_width = |image =Lmeyer.jpg |image_width =150px |caption = {{PAGENAME}} |birth_date = [[August 19]], [[1830]] |birth_place = [[Varel]] |death_date = [[April 11]], [[1895]] |death_place = |residence = |citizenship = |nationality = |ethnicity = |field = [[chemistry]] |work_institutions = [[University of Tübingen]] |alma_mater = |doctoral_advisor = |doctoral_students = |known_for = [[periodic table]] of [[chemical element]]s |author_abbrev_bot = |author_abbrev_zoo = |influences = [[Robert Bunsen]] |influenced = |prizes = |religion = |footnotes = |signature = }} '''Julius Lothar Meyer''' ([[August 19]], [[1830]] - [[April 11]], [[1895]]) was born in [[Varel]], at that time belonging to the duchy of [[Oldenburg]], now part of [[Germany]]. He was contemporary and competitor of [[Dmitri Mendeleev]] to draw up the first [[periodic table]] of [[chemical element]]s. Some five years apart, both Mendeleev and Meyer worked with [[Robert Bunsen]]. ==Biography== Meyer qualified in medicine at [[Zürich]], [[Switzerland]], and then studied and taught at various German universities. His first interest was the [[physiology]] of [[Respiration (physiology)|respiration]], and in 1857, he recognized that [[oxygen]] combines with the [[hemoglobin]] in [[blood]]. In 1864, Meyer published an early version of the periodic table, containing 28 elements classified into 6 families by their [[valence (chemistry)|valence]]—the first time that elements had been grouped and ordered according to their valence. Work on organizing the elements by [[atomic weight]] had hitherto been stymied by inaccurate measurements of the atomic weights. Mendeleev published his periodic table of all known elements (and predicted several new elements to complete the table, plus some corrected atomic weights) in 1869. Working completely independently, a few months later, Meyer published a revised and expanded version of his 1864 table, virtually identical to that published by Mendeleev, and a paper showing graphically the periodicity of the elements as a function of atomic weight. Many chemists were doubtful about Mendeleev's periodic law, but Meyer's work provided significant support, particularly when the new elements were found as predicted and remeasured atomic weights accorded with those predicted. Meyer's contributions also included the concept that the [[carbon]] atoms in [[benzene]] were arranged in a ring, although he did not propose the alternation of single and double bonds that later became included in the structure by [[Kekulé]]. In 1876, Meyer became the first Professor of Chemistry at the [[University of Tübingen]], where he served until his death there. ==See also== *[[History of the periodic table]] ==External Links== * [http://www.chemie-master.de/pse/pse.php?modul=pse_meyer Periodic table according to Lothar Meyer (1870)] * [http://osulibrary.oregonstate.edu/specialcollections/events/2007paulingconference/video-s1-2-gordin.html Video] of a talk by Michael Gordin titled "Periodicity, Priority, Pedagogy: Mendeleev and Lothar Meyer" {{DEFAULTSORT:Meyer, Julius Lothar}} [[Category:1830 births]] [[Category:1895 deaths]] [[Category:German chemists]] [[bn:জুলিয়াস লোথার মাইয়ার]] [[bs:Lothar Meyer]] [[ca:Julius Lothar Meyer]] [[de:Lothar Meyer]] [[es:Julius Lothar Meyer]] [[fr:Julius Lothar Meyer]] [[gd:Lothar Meyer]] [[it:Julius Lothar Meyer]] [[nl:Lothar Meyer]] [[ja:ロータル・マイヤー]] [[pt:Lothar Meyer]] [[ru:Мейер, Лотар]] [[sq:Lothar Meyer]] [[fi:Lothar Meyer]] [[sv:Lothar Meyer]]