The temperature on December 1, 1911 was between 0.2 °C and 6.5 °C and averaged 4.9 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I14981.php : accessed January 28, 2026), "Petrus Schalk Visser (1911-)".
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