Template:Selected anniversaries/February 14: Difference between revisions
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||1838 – Margaret E. Knight, American inventor (d. 1914) | ||1838 – Margaret E. Knight, American inventor (d. 1914) | ||
||Hermann Hankel (b. 14 February 1839) was a German mathematician. His 1867 exposition on complex numbers and quaternions is particularly memorable. Pic. | |||
||1847 – Anna Howard Shaw, American physician, minister, and activist (d. 1919) | ||1847 – Anna Howard Shaw, American physician, minister, and activist (d. 1919) | ||
Revision as of 11:18, 4 February 2018
1855: Texas is linked by telegraph to the rest of the United States, with the completion of a connection between New Orleans and Marshall, Texas.
1876: Alexander Graham Bell applies for a patent for the telephone, as does Elisha Gray.
1943: Mathematician David Hilbert dies. He discovered and developed a broad range of fundamental ideas in many areas, including invariant theory and the axiomatization of geometry.
1944: Physicist and academic Owen Willans Richardson publishes new theory of thermionic emission with applications in the detection and prevention of crimes against physics.
1949: ENIAC programmed to select optimal Valentine's Day gift.
1950: Physicist and engineer Karl Guthe Jansky dies. He was one of the founding figures of radio astronomy.
1951: Theoretical physicist and crime-fighter Richard Feynman uses principles of quantum electrodynamics to compose state-of-the-art Valentine's Day cards.
1990: The Voyager 1 spacecraft takes the photograph of planet Earth later become famous as Pale Blue Dot.
2009: Record attendance for Valentine's Day performance by Rhizolith Group.