The temperature on July 24, 1911 was between 12.6 °C and 23.2 °C and averaged 18.2 °C. There was 11.8 hours of sunshine (74%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
When copying data from this family tree, please include a reference to the origin: Frank van Leeuwen, "Family tree Van Leeuwen - Amsterdam", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-leeuwen-amsterdam/I516.php : accessed May 10, 2025), "GRIETJE von HERZBERG (1911-> 1960)".
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