The temperature on April 21, 1909 was between 4.5 °C and 12.6 °C and averaged 8.5 °C. There was 3.4 hours of sunshine (24%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 16 » Ernest Shackleton's expedition finds the magnetic South Pole.
March 10 » By signing the Anglo-Siamese Treaty of 1909, Thailand relinquishes its sovereignty over the Malay states of Kedah, Kelantan, Perlis and Terengganu, which become British protectorates.
April 9 » The U.S. Congress passes the Payne–Aldrich Tariff Act.
April 18 » Joan of Arc is beatified in Rome.
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.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I67100.php : accessed March 16, 2026), "Jan Vos (1909-)".
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