 1847 - Joseph-Achille Le Bel born: structural organic chemistry (tetrahedral carbon). |
| 1848 - Gold discovered at Sutter's Mill, California causing '49er gold rush. |
| 1872 - Morris W. Travers born: codiscoverer of krypton (Kr, element 36), neon (Ne, 10), and xenon (Xe, 54); low temperature chemistry. |
| 1966 - B. B. Cunningham and coworkers first reported absorption spectrum of einsteinium compound (Es, element 99) at University of California, Berkeley. |
sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com
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