Events
1846 - Discovery of Neptune by Urbain Jean Joseph Le Verrier and John Couch Adams
1884 - Herman Hollerith patents his mechanical tabulating machine.
1999 - NASA announces that it has lost contact with the Mars Climate Orbiter.
Births
1791 - Johann Franz Encke, German astronomer
1819 - Hippolyte Fizeau, French physicist
1852 - William Stewart Halsted, American surgeon
1880 - John Boyd Orr, Scottish physician and Nobel Prize laureate
1915 - Clifford Shull, American physicist and Nobel Prize laureate
Deaths
1873 - Jean Chacornac, French astronomer
1929 - Richard Adolf Zsigmondy, Austrian-born chemist and Nobel Prize laureate
1939 - Sigmund Freud, Austrian psychiatrist
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Births
1646 (O.S.) - Gottfried Wilhelm Leibniz, German philosopher and scientist