The temperature on January 31, 1911 was between -5.9 °C and 0.3 °C and averaged -3.3 °C. There was 8.2 hours of sunshine (91%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
December 29 » Sun Yat-sen becomes the provisional President of the Republic of China; he formally takes office on January 1, 1912.
When copying data from this family tree, please include a reference to the origin: Tijs van den Brink, "Parentele of Geurt Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/geurt-jacobs/I67001.php : accessed March 6, 2026), "Hendrikus Dokter (1911-)".
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