The temperature on September 9, 1911 was between 10.7 °C and 20.2 °C and averaged 16.2 °C. There was 0.2 mm of rain. There was 6.3 hours of sunshine (48%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 15 » Palestinian Arabic-language Falastin newspaper founded.
January 29 » Mexican Revolution: Mexicali is captured by the Mexican Liberal Party, igniting the Magonista rebellion of 1911.
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
When copying data from this family tree, please include a reference to the origin: J. den Nieuwenboer, "Family tree Den Nieuwenboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-den-nieuwenboer/I14862.php : accessed May 11, 2025), "Petronella van der Kolk (1911-)".
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