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Events
1919 – Einstein’s theory of general relativity is tested (later confirmed) by Arthur Eddington‘s observation of a total solar eclipse in Principe and by Andrew Crommelin in Sobral, Ceará, Brazil.
Births
1675 – Humphry Ditton, English mathematician
1716 – Louis-Jean-Marie Daubenton, French naturalist
Deaths
1660 – Frans van Schooten, Dutch mathematician
1829 – Humphry Davy, English chemist
1896 – Gabriel Auguste Daubrée, French geologist