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Portal:History of science/Selected anniversaries/July

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Selected anniversaries in July

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  • 1850 - The self-contained gas mask is patented by Benjamin J. Lane






  • 1959 - 14:28 UT Venus occults the star Regulus. This rare event was used to determine the diameter of Venus and the structure of the Venusian atmosphere





  • 1735 - Mathematical calculations suggest that it was on this day that Pluto moved from the ninth to the eighth most distant planet from the Sun for the last time before 1979


















  • 2000 - Death of Abraham Pais, Dutch-born American physicist and historian (b. 1918)