The temperature on June 23, 1911 was between 12.2 °C and 19.3 °C and averaged 15.2 °C. There was 6.4 mm of rain. There was 1.2 hours of sunshine (7%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
September 29 » Italy declares war on the Ottoman Empire.
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 December 16, 1932
The temperature on December 16, 1932 was between 1.4 °C and 7.9 °C and averaged 5.2 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
July 28 » U.S. President Herbert Hoover orders the United States Army to forcibly evict the "Bonus Army" of World War I veterans gathered in Washington, D.C.
July 29 » Great Depression: In Washington, D.C., troops disperse the last of the "Bonus Army" of World War I veterans.
August 10 » A 5.1 kilograms (11lb) chondrite-type meteorite breaks into at least seven pieces and lands near the town of Archie in Cass County, Missouri.
September 5 » The French Upper Volta is broken apart between Ivory Coast, French Sudan, and Niger.
September 29 » Chaco War: Last day of the Battle of Boquerón between Paraguay and Bolivia.
December 18 » The Chicago Bears defeat the Portsmouth Spartans in the first NFL playoff game to win the NFL Championship.
Day of death October 4, 1964
The temperature on October 4, 1964 was between 7.2 °C and 18.1 °C and averaged 11.2 °C. There was 8.9 hours of sunshine (78%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
July 19 » Vietnam War: At a rally in Saigon, South Vietnamese Prime Minister Nguyễn Khánh calls for expanding the war into North Vietnam.
August 19 » Syncom 3, the first geostationary communication satellite, was launched.
September 21 » Malta gains independence from the United Kingdom, but remains in the Commonwealth.
December 1 » Vietnam War: U.S. President Lyndon B. Johnson and his top-ranking advisers meet to discuss plans to bomb North Vietnam.
December 4 » Free Speech Movement: Police arrest over 800 students at the University of California, Berkeley, following their takeover and sit-in at the administration building in protest of the UC Regents' decision to forbid protests on UC property.
December 5 » Vietnam War: For his heroism in battle earlier in the year, Captain Roger Donlon is awarded the first Medal of Honor of the war.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I8127.php : accessed February 15, 2026), "Heinrich Wittenbernds (1911-1964)".
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