The temperature on May 13, 1911 was between 11.4 °C and 22.5 °C and averaged 16.9 °C. There was 7.0 hours of sunshine (45%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
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 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
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.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
When copying data from this family tree, please include a reference to the origin: A. Hakkert , "Family tree Hakkert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hakkert/I6045.php : accessed February 16, 2026), "Hendrikje Dijkstra (1884-????)".
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