The temperature on September 4, 1911 was between 5.1 °C and 22.1 °C and averaged 15.0 °C. There was 9.9 hours of sunshine (74%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
June 22 » George V and Mary of Teck are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
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.
When copying data from this family tree, please include a reference to the origin: E. Hillebregt - Zuiderwijk, "Family tree Scheffer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-scheffer/I712.php : accessed February 11, 2026), "Petronella Gerarda Maria Bakker (1911-)".
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