The temperature on May 16, 1881 was about 12.9 °C. There was 0.4 mm of rain. The air pressure was 21 kgf/m2 and came mainly from the west-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 73%. 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.
February 24 » China and Russia sign the Sino-Russian Ili Treaty.
May 10 » Carol I is crowned the King of the Romanian Kingdom.
May 12 » In North Africa, Tunisia becomes a French protectorate.
May 21 » The American Red Cross is established by Clara Barton in Washington, D.C.
June 28 » The Austro–Serbian Alliance of 1881 is secretly signed.
September 19 » U.S. President James A. Garfield dies of wounds suffered in a July 2 shooting. Vice President Chester A. Arthur becomes President upon Garfield's death.
Day of death January 31, 1961
The temperature on January 31, 1961 was between 5.3 °C and 7.8 °C and averaged 6.3 °C. There was 0.9 mm of rain during 1.5 hours. There was 1.0 hours of sunshine (11%). The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 31 » Project Mercury: Mercury-Redstone 2: Ham the Chimp travels into outer space.
September 1 » The Eritrean War of Independence officially begins with the shooting of Ethiopian police by Hamid Idris Awate.
September 16 » Pakistan establishes its Space and Upper Atmosphere Research Commission with Abdus Salam as its head.
October 30 » The Soviet Union detonates the Tsar Bomba, the most powerful explosive device ever detonated.
November 21 » The "La Ronde" opens in Honolulu, first revolving restaurant in the United States.
November 29 » Project Mercury: Mercury-Atlas 5 Mission: Enos, a chimpanzee, is launched into space. The spacecraft orbits the Earth twice and splashes down off the coast of Puerto Rico.
When copying data from this family tree, please include a reference to the origin: Rob van Koert, "Family tree Van Koert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-koert/I67201.php : accessed March 3, 2026), "Jacob Gerardus van Roon (1881-1961)".
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