The temperature on September 25, 1880 was about 17.5 °C. The air pressure was 1 kgf/m2 and came mainly from the west. The airpressure was 76 cm mercury. The atmospheric humidity was 80%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
January 27 » Thomas Edison receives a patent for his incandescent lamp.
May 13 » In Menlo Park, New Jersey, Thomas Edison performs the first test of his electric railway.
June 7 » War of the Pacific: The Battle of Arica, the assault and capture of Morro de Arica (Arica Cape), ends the Campaña del Desierto (Desert Campaign).
June 24 » First performance of O Canada at the Congrès national des Canadiens-Français. The song would later become the national anthem of Canada.
June 28 » Australian bushranger Ned Kelly is captured at Glenrowan.
August 14 » Construction of Cologne Cathedral, the most famous landmark in Cologne, Germany, is completed.
Day of marriage May 11, 1911
The temperature on May 11, 1911 was between 10.3 °C and 22.5 °C and averaged 16.5 °C. There was 11.2 hours of sunshine (72%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 29 » Mexican Revolution: Mexicali is captured by the Mexican Liberal Party, igniting the Magonista rebellion of 1911.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
November 11 » Many cities in the Midwestern United States break their record highs and lows on the same day as a strong cold front rolls through.
December 9 » A mine explosion near Briceville, Tennessee, kills 84 miners despite rescue efforts led by the United States Bureau of Mines.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of death January 16, 1940
The temperature on January 16, 1940 was between -9.2 °C and 2.5 °C and averaged -3.1 °C. There was 4.7 mm of rain during 6.6 hours. There was 0.1 hours of sunshine (1%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
February 16 » World War II: Altmark incident: The German tanker Altmark is boarded by sailors from the British destroyer HMSCossack. 299 British prisoners are freed.
April 14 » World War II: Royal Marines land in Namsos, Norway in preparation for a larger force to arrive two days later.
June 3 » World War II: The Battle of Dunkirk ends with a German victory and with Allied forces in full retreat.
August 26 » Chad becomes the first French colony to join the Allies under the administration of Félix Éboué, France's first black colonial governor.
September 12 » An explosion at the Hercules Powder Company plant in Kenvil, New Jersey kills 51 people and injures over 200.
November 25 » World War II: First flights of both the de Havilland Mosquito and Martin B-26 Marauder.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I105766.php : accessed January 6, 2026), "Pieter de Groot (1880-1940)".
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