The temperature on April 8, 1911 was between -0.5 °C and 11.6 °C and averaged 5.7 °C. There was 5.6 hours of sunshine (42%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
When copying data from this family tree, please include a reference to the origin: Hans Coster, "Family tree Coster", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-coster/R26.php : accessed January 1, 2026), "Wilhelmine Oudendorp (1911-)".
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