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Science on the 31st of July in history

Science

Date	Type	Text
31 Jul 1704 Gabriel Cramer	science	birth Gabriel Cramer Gabriel Cramer, Swiss mathematician (died 1752)	0
31 Jul 1790 Samuel Hopkins	science	Samuel Hopkins (chemistry) Samuel Hopkins of Vermont is granted a patent for a potash production technique, the first issued under the 1st United States Congress's Patent Act of 1790.	0
31 Jul 1800 Friedrich Woehler	science	birth Friedrich Woehler Friedrich Woehler, German chemist (died 1882)	0
31 Jul 1801 George Biddell Airy	science	birth George Biddell Airy George Biddell Airy, English astronomer (died 1892)	0
31 Jul 1803 John Ericsson	science	birth John Ericsson John Ericsson, Swedish inventor and engineer (died 1889)	0
31 Jul 1923 Stephanie Kwolek	science	birth Stephanie Kwolek Stephanie Kwolek (died 2014), American polymer chemist.	0
31 Jul 1940 Louis Charles Christopher Krieger	science	death Louis Charles Christopher Krieger Louis Charles Christopher Krieger (born 1873), American mycologist.	0
31 Jul 1962 Annular solar eclipse	science	Annular solar eclipse (astronomy and space ) Annular solar eclipse.	0
31 Jul 1964 Ranger program	science	Ranger program (astronomy and space ) Ranger program: Ranger 7 sends back the first close-up photographs of the Moon; images are 1,000 times clearer than anything ever seen from Earth-bound telescopes.	0
31 Jul 1976 NASA	science	NASA (astronomy and space ) NASA releases the famous 'Face on Mars' photograph, taken by Viking 1	0
31 Jul 1981 Ernest Melville DuPorte	science	death Ernest Melville DuPorte Ernest Melville DuPorte (b. 1891), Black Canadian insect morphologist.	0

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