The temperature on June 1, 1911 was between 12.8 °C and 23.6 °C and averaged 18.4 °C. There was 14.0 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
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 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
December 9 » A mine explosion near Briceville, Tennessee, kills 84 miners despite rescue efforts led by the United States Bureau of Mines.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I110808.php : accessed January 25, 2026), "Helena Catharina Magareta Knispel (1887-????)".
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