 1824 - Pierre Jules Cesar Janssen born: astronomical spectroscopy and photography, particularly of the Sun; found a line in the solar spectrum subsequently identified with helium. |
| 1828 - Friedrich Wöhler wrote to J. J. Berzelius that he had synthesized urea, the first synthesis of an organic compound from inorganic materials. |
| 1879 - Johannes N. Brønsted born: acid-base theory and properties of ions; kinetics and catalysis; nitramide. |
| 1956 - U.S. released $1 million of uranium for civilian nuclear power. |
sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com
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