April 20 » Pierre and Marie Curie refine radium chloride.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
Day of death August 19, 1961
The temperature on August 19, 1961 was between 12.3 °C and 16.5 °C and averaged 14.2 °C. There was 13.7 mm of rain during 6.5 hours. There was 2.1 hours of sunshine (15%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 3 » The SL-1 nuclear reactor is destroyed by a steam explosion in the only reactor incident in the United States to cause immediate fatalities.
February 12 » The Soviet Union launches Venera 1 towards Venus.
February 14 » Discovery of the chemical elements: Element 103, Lawrencium, is first synthesized at the University of California.
August 25 » President Jânio Quadros of Brazil resigns after just seven months in power, initiating a political crisis that culminates in a military coup in 1964.
October 20 » The Soviet Union performs the first armed test of a submarine-launched ballistic missile, launching an R-13 from a Golf-class submarine.
October 30 » The Soviet Union detonates the Tsar Bomba, the most powerful explosive device ever detonated.
When copying data from this family tree, please include a reference to the origin: Hans van Weeghel, "Family tree Van Weeghel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-familie-van-weeghel/I6373.php : accessed May 25, 2024), "Cornelis Hendrik Liefers (1902-1961)".
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