The temperature on June 6, 1911 was between 13.0 °C and 23.7 °C and averaged 18.3 °C. There was 13.7 hours of sunshine (83%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
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.
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.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising 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.
Day of marriage October 12, 1935
The temperature on October 12, 1935 was between 5.0 °C and 13.8 °C and averaged 9.2 °C. There was 0.1 mm of rain during 0.1 hours. There was 8.5 hours of sunshine (78%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
July 1 » Regina, Saskatchewan police and Royal Canadian Mounted Police ambush strikers participating in the On-to-Ottawa Trek.
July 5 » The National Labor Relations Act, which governs labor relations in the United States, is signed into law by President Franklin D. Roosevelt.
July 16 » The world's first parking meter is installed in Oklahoma City, Oklahoma.
July 24 » The Dust Bowl heat wave reaches its peak, sending temperatures to 109°F (43°C) in Chicago and 104°F (40°C) in Milwaukee.
September 15 » Nazi Germany adopts a new national flag bearing the swastika.
December 5 » Mary McLeod Bethune founds the National Council of Negro Women in New York City.
Day of death January 11, 1971
The temperature on January 11, 1971 was between -0.4 °C and 7.7 °C and averaged 3.8 °C. There was 4.3 hours of sunshine (53%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I5613.php : accessed January 24, 2026), "Hendrik Jacobus Prinsloo Dreyer b5c1d3e9f4g2h3 (1911-1971)".
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