Template:Selected anniversaries/May 18: Difference between revisions

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File:Bertrand Russell transparent bg.png|link=Bertrand Russell (nonfiction)|1872: Philosopher, logician, mathematician, historian, writer, social critic and political activist [[Bertrand Russell (nonfiction)|Bertrand Russell]] born.
File:Bertrand Russell transparent bg.png|link=Bertrand Russell (nonfiction)|1872: Philosopher, logician, mathematician, historian, writer, social critic and political activist [[Bertrand Russell (nonfiction)|Bertrand Russell]] born.
||Erwin Madelung (b. 18 May 1881) was a German physicist. He was born in 1881 in Bonn. His father was the surgeon Otto Wilhelm Madelung. He earned a doctorate in 1905 from the University of Göttingen, specializing in crystal structure, and eventually became a professor. It was during this time he developed the Madelung constant, which characterizes the net electrostatic effects of all ions in a crystal lattice, and is used to determine the energy of one ion.


||1889 – Thomas Midgley, Jr., American chemist and engineer (d. 1944) Doctor Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical engineer and chemist. He was a key figure in a team of chemists, led by Charles F. Kettering, that developed the tetraethyllead (TEL) additive to gasoline as well as some of the first chlorofluorocarbons (CFCs).
||1889 – Thomas Midgley, Jr., American chemist and engineer (d. 1944) Doctor Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical engineer and chemist. He was a key figure in a team of chemists, led by Charles F. Kettering, that developed the tetraethyllead (TEL) additive to gasoline as well as some of the first chlorofluorocarbons (CFCs).

Revision as of 10:51, 29 November 2017