The temperature on January 17, 1911 was between -4 °C and 2.3 °C and averaged 0.2 °C. There was 0.1 mm of rain. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
January 14 » Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
October 24 » Orville Wright remains in the air nine minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina.
Day of death February 10, 1961
The temperature on February 10, 1961 was between 2.6 °C and 9.4 °C and averaged 5.9 °C. There was 0.1 mm of rain. There was 0.2 hours of sunshine (2%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
April 16 » In a nationally broadcast speech, Cuban leader Fidel Castro declares that he is a Marxist–Leninist and that Cuba is going to adopt Communism.
April 17 » Bay of Pigs Invasion: A group of Cuban exiles financed and trained by the CIA lands at the Bay of Pigs in Cuba with the aim of ousting Fidel Castro.
April 30 » K-19, the first Soviet nuclear submarine equipped with nuclear missiles, is commissioned.
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.
November 29 » Project Mercury: Mercury-Atlas 5 Mission: Enos, a chimpanzee, is launched into space. The spacecraft orbits the Earth twice and splashes down off the coast of Puerto Rico.
December 15 » Adolf Eichmann is sentenced to death after being found guilty by an Israeli court of 15 criminal charges, including charges of crimes against humanity, crimes against the Jewish people, and membership of an outlawed organization.
When copying data from this family tree, please include a reference to the origin: Fake Slot, "Genealogy Slot", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_slot/I35531.php : accessed August 9, 2025), "Harm Post (1911-1961)".
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