The temperature on July 24, 1911 was between 12.0 °C and 22.3 °C and averaged 17.7 °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
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
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: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I380634.php : accessed February 18, 2026), "Henrica Judith Walenberg (1890-????)".
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