The temperature on June 29, 1889 was about 24.9 °C. The air pressure was 4 kgf/m2 and came mainly from the east-southeast. The airpressure was 77 cm mercury. The atmospheric humidity was 52%. Source: KNMI
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
May 31 » Johnstown Flood: Over 2,200 people die after a dam fails and sends a 60-foot (18-meter) wall of water over the town of Johnstown, Pennsylvania.
June 29 » Hyde Park and several other Illinois townships vote to be annexed by Chicago, forming the largest United States city in area and second largest in population at the time.
July 11 » Tijuana, Mexico, is founded.
September 28 » The General Conference on Weights and Measures (CGPM) defines the length of a meter.
November 8 » Montana is admitted as the 41st U.S. state.
Day of death February 20, 1953
The temperature on February 20, 1953 was between 4.1 °C and 7.3 °C and averaged 5.7 °C. There was 0.2 mm of rain during 0.8 hours. The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
February 3 » The Batepá massacre occurred in São Tomé when the colonial administration and Portuguese landowners unleashed a wave of violence against the native creoles known as forros.
February 11 » The Soviet Union breaks off diplomatic relations with Israel.
April 25 » Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA.
August 22 » The penal colony on Devil's Island is permanently closed.
September 21 » Lieutenant No Kum-sok, a North Korean pilot, defects to South Korea with his jet fighter.
December 6 » Vladimir Nabokov completes his controversial novel Lolita.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I28430.php : accessed October 1, 2026), "Anna Maria Meersman (1889-1953)".
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