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TAPAHTUMAT 30. HUHTIKUU
J. J. Thomson
Vuosi:
1897
J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
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Hawaii
Vuosi:
1900
Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
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Governor of New York
Vuosi:
1885
Governor of New York David B. Hill signs legislation creating the Niagara Reservation, New York's first state park, ensuring that Niagara Falls will not be devoted solely to industrial and commercial use.
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American Civil War
Vuosi:
1864
American Civil War: Confederate forces led by General E. Kirby Smith attack federal troops retreating across the Saline at Jenkins' Ferry, Arkansas.
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Albert Einstein
Vuosi:
1905
Albert Einstein completes his doctoral thesis at the University of Zurich.
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Federal Prison Camp, Alderson
Vuosi:
1927
The Federal Industrial Institute for Women opens in Alderson, West Virginia, as the first women's federal prison in the United States.
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SYNTYMäT 30. HUHTIKUU
Frederick Chiluba
Syntymävuosi:
1943
Frederick Chiluba, Zambian politician, 2nd President of Zambia (died 2011)
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Michael J. Smith
Syntymävuosi:
1945
Michael J. Smith, American pilot, and astronaut (died 1986)
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KUOLEMAT 30. HUHTIKUU
Jean-Frédéric Waldeck
Kuolinvuosi:
1875
Jean-Frédéric Waldeck, French explorer, lithographer, and cartographer (born 1766)
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Thomas Cooke (bishop)
Kuolinvuosi:
1870
Thomas Cooke, Canadian bishop and missionary (born 1792)
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Robert FitzRoy
Kuolinvuosi:
1865
Robert FitzRoy, English admiral, meteorologist, and politician, 2nd Governor of New Zealand (born 1805)
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Onogawa Kisaburō
Kuolinvuosi:
1806
Onogawa Kisaburō, Japanese sumo wrestler, the 5th Yokozuna (born 1758)
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JUHLAPäIVäT 30. HUHTIKUU
April 30 (Eastern Orthodox liturgics)
Christian feast day: April 30 (Eastern Orthodox liturgics)
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Beltane
May Eve, the eve of the first day of summer in the Northern hemisphere (see May 1): Beltane begins at sunset in the Northern hemisphere, Samhain begins at sunset in the Southern hemisphere. (Neo-Druidic Wheel of the Year)
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