The temperature on August 4, 1889 was about 19.1 °C. The air pressure was 10 kgf/m2 and came mainly from the southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 78%. Source: KNMI
January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
March 31 » The Eiffel Tower is officially opened.
April 1 » The University of Northern Colorado was established, as the Colorado State Normal School.
May 11 » An attack upon a U.S. Army paymaster and escort results in the theft of over $28,000 and the award of two Medals of Honor.
November 2 » North Dakota and South Dakota are admitted as the 39th and 40th U.S. states.
November 15 » Brazil is declared a republic by Marshal Deodoro da Fonseca as Emperor Pedro II is deposed in a military coup.
Day of death March 23, 1961
The temperature on March 23, 1961 was between 6.7 °C and 11.4 °C and averaged 8.2 °C. There was 1.6 hours of sunshine (13%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 23 » The Portuguese luxury cruise ship Santa Maria is hijacked by opponents of the Estado Novo regime with the intention of waging war until dictator António de Oliveira Salazar is overthrown.
April 20 » Cold War: Failure of the Bay of Pigs Invasion of US-backed Cuban exiles against Cuba.
May 19 » Venera program: Venera 1 becomes the first man-made object to fly by another planet by passing Venus (the probe had lost contact with Earth a month earlier and did not send back any data).
May 25 » Apollo program: U.S. President John F. Kennedy announces, before a special joint session of the U.S. Congress, his goal to initiate a project to put a "man on the Moon" before the end of the decade.
May 31 » In Moscow City Court, the Rokotov–Faibishenko show trial begins, despite the Khrushchev Thaw to reverse Stalinist elements in Soviet society.
July 12 » Indian city Pune floods due to failure of the Khadakwasla and Panshet dams, killing at least two thousand people.
When copying data from this family tree, please include a reference to the origin: Nabestaanden Sierd Eizenga , "Family tree Eizenga-Vis", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eizenga-vis/I6830.php : accessed February 16, 2026), "Sijke Hendriks Jonkman (1889-1961)".
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