The temperature on June 13, 1911 was between 5.3 °C and 17.0 °C and averaged 11.6 °C. There was 5.2 mm of rain. There was 7.3 hours of sunshine (44%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
Day of marriage October 16, 1929
The temperature on October 16, 1929 was between 8.6 °C and 16.7 °C and averaged 12.5 °C. There was 4.6 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from March 8, 1926 to August 10, 1929 the cabinet De Geer I, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
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.
February 9 » Members of the Viet Nam Quoc Dan Dang assassinated the labor recruiter Bazin, prompting a crackdown by French colonial authorities.
February 26 » President Calvin Coolidge signs an executive order establishing the 96,000 acre Grand Teton National Park in Wyoming.
April 6 » Huey P. Long, Governor of Louisiana, is impeached by the Louisiana House of Representatives.
June 1 » The 1st Conference of the Communist Parties of Latin America is held in Buenos Aires.
August 23 » Hebron Massacre during the 1929 Palestine riots: Arab attack on the Jewish community in Hebron in the British Mandate of Palestine, continuing until the next day, resulted in the death of 65–68 Jews and the remaining Jews being forced to leave the city.
December 24 » A four alarm fire breaks out in the West Wing of the White House in Washington, D.C.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I34568.php : accessed January 14, 2026), "Jacoba de Klerk (1911-)".
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