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 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
February 11 » Meiji Constitution of Japan is adopted.
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.
September 28 » The General Conference on Weights and Measures (CGPM) defines the length of a meter.
November 2 » North Dakota and South Dakota are admitted as the 39th and 40th U.S. states.
November 8 » Montana is admitted as the 41st U.S. state.
Day of death April 4, 1970
The temperature on April 4, 1970 was between 0.2 °C and 6.5 °C and averaged 2.5 °C. There was 3.3 mm of rain during 2.2 hours. There was 2.7 hours of sunshine (21%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
March 18 » Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
August 24 » Vietnam War protesters bomb Sterling Hall at the University of Wisconsin–Madison, leading to an international manhunt for the perpetrators.
September 7 » Fighting begins between Arab guerrillas and government forces in Jordan.
November 12 » The Oregon Highway Division attempts to destroy a rotting beached Sperm whale with explosives, leading to the now infamous "exploding whale" incident.
December 2 » The United States Environmental Protection Agency begins operations.
December 17 » Polish protests: In Gdynia, soldiers fire at workers emerging from trains, killing dozens.
When copying data from this family tree, please include a reference to the origin: Jaap Geensen, "Geensen database", database, Genealogy Online (https://www.genealogieonline.nl/geensen-database/I4002.php : accessed December 27, 2025), "Jannetje Paardekooper (1889-1970)".
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