Template:Selected anniversaries/February 14: Difference between revisions
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File:Rotary dial telephone.jpg|link=Telephone (nonfiction)|1876: [[Alexander Graham Bell (nonfiction)|Alexander Graham Bell]] applies for a patent for the [[Telephone (nonfiction)|telephone]], as does [[Elisha Gray (nonfiction)|Elisha Gray]]. | File:Rotary dial telephone.jpg|link=Telephone (nonfiction)|1876: [[Alexander Graham Bell (nonfiction)|Alexander Graham Bell]] applies for a patent for the [[Telephone (nonfiction)|telephone]], as does [[Elisha Gray (nonfiction)|Elisha Gray]]. | ||
||1877: Edmund Georg Hermann Landau born ... mathematician who worked in the fields of number theory and complex analysis. | ||1877: Edmund Georg Hermann Landau born ... mathematician who worked in the fields of number theory and complex analysis. Pic. | ||
||1877: Greenleaf Whittier Pickard born ... radio pioneer. He was responsible for the development of the crystal detector, (cat's whisker detector), a radio wave detector which was the central component in early radio receivers called crystal radios. He also experimented with antennas, radio wave propagation, and noise suppression. Pic. | ||1877: Greenleaf Whittier Pickard born ... radio pioneer. He was responsible for the development of the crystal detector, (cat's whisker detector), a radio wave detector which was the central component in early radio receivers called crystal radios. He also experimented with antennas, radio wave propagation, and noise suppression. Pic. | ||
Revision as of 05:45, 20 February 2019
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.
1904: Engineer and inventor Charles William Oatley born. He will develop of one of the first commercial scanning electron microscopes.
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 uses thermionic theory to compute optimal Valentine's Day card.
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.
2017: Steganographic analysis of famed illustration Alice and Niles Dancing reveals three terabytes of love letters between mathematicians Alice Beta and Niles Cartouchian.