The temperature on May 31, 1909 was between 10.6 °C and 23.0 °C and averaged 16.9 °C. There was 9.7 hours of sunshine (59%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
January 9 » Ernest Shackleton, leading the Nimrod Expedition to the South Pole, plants the British flag 97 nautical miles (180km; 112mi) from the South Pole, the farthest anyone had ever reached at that time.
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
April 9 » The U.S. Congress passes the Payne–Aldrich Tariff Act.
May 31 » The National Negro Committee, forerunner to the National Association for the Advancement of Colored People (NAACP), convenes for the first time.
June 26 » The Science Museum in London comes into existence as an independent entity.
August 30 » Burgess Shale fossils are discovered by Charles Doolittle Walcott.
Day of marriage May 25, 1937
The temperature on May 25, 1937 was between 9.3 °C and 26.9 °C and averaged 19.0 °C. There was 12.8 hours of sunshine (79%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Rik Plomp, "Pedigree Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plomp/I4131.php : accessed January 1, 2026), "Henderika Heusdens (1909-)".
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