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Thursday, April 10, 2025
Open today 4 PM - 11 PM
Phonic wheel, allowing up to 100 telegraph messages to be sent over a single wire, wood engraving in La roue phonique, by Poul La Cour, p. 64, 1878 (Linda Hall Library)
Poul La Cour, a Danish scientist, teacher, and inventor, died on Apr. 24, 1908, at the age of 62. He was born on Apr. 13, 1846, in east Jutland...
Louis Bourguet, a French/Swiss naturalist, philosopher, and historian, was born Apr. 23, 1678, in Nîmes. His parents were Huguenots, and when...
J. Robert Oppenheimer, an American theoretical physicist, was born Apr. 22, 1904. Oppenheimer was a gifted mathematician who came of age during the...
Hero of Alexandria, an ancient Greek engineer, lived in Alexandria in Roman Egypt, perhaps in the first century BCE...
Albert Einstein, a German/American physicist, died in Princeton, New Jersey, on Apr. 18, 1955, age 76.
Charles Blagden, an English physician, chemist, and scientific diplomat, was born Apr. 17, 1748.
Jacques Cassini, a French astronomer, died Apr. 16, 1756, at the age of 79
Benjamin Jowett, an English classical scholar and Anglican priest, was born Apr. 15, 1817.
Louis Sullivan, American architect, died on Apr. 14, 1924, in Chicago, at the age of 67.
April 11 is National Submarine Day.
Louis Vicat, a French engineer and bridge builder, died Apr. 10, 1861, at the age of 75.
J. Presper Eckert, an American electrical engineer and computer expert, was born Apr. 9, 1919, in Philadelphia.
Pablo Picasso, a Spanish painter, died Apr. 8, 1973, at the age of 91.
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