The temperature on March 15, 1937 was between 2.1 °C and 5.9 °C and averaged 4.3 °C. There was 6.1 mm of rain during 8.3 hours. The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. Source: KNMI
May 7 » Spanish Civil War: The German Condor Legion, equipped with Heinkel He 51 biplanes, arrives in Spain to assist Francisco Franco's forces.
May 21 » A Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean.
June 14 » U.S. House of Representatives passes the Marihuana Tax Act.
June 30 » The world's first emergency telephone number, 999, is introduced in London.
August 24 » Spanish Civil War: Sovereign Council of Asturias and León is proclaimed in Gijón.
December 16 » Theodore Cole and Ralph Roe attempt to escape from the American federal prison on Alcatraz Island in San Francisco Bay; neither is ever seen again.
When copying data from this family tree, please include a reference to the origin: Tineke de Groot, "Family tree De Groot", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-groot/R27.php : accessed March 1, 2026), "Anna Maria Vaessen (1860-1937)".
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