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Births on April 22

Harold Jeffreys
1891Apr, 22

Harold Jeffreys

Harold Jeffreys, English mathematician, geophysicist, and astronomer (d. 1989)
Sir Harold Jeffreys, FRS (22 April 1891 – 18 March 1989) was a British mathematician, statistician, geophysicist, and astronomer. His book, Theory of Probability, which was first published in 1939, played an important role in the revival of the objective Bayesian view of probability.

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Events on 1891

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    Almon Strowger, an undertaker in Topeka, Kansas, patents the Strowger switch, a device which led to the automation of telephone circuit switching.
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    Kinetoscope

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