The temperature on April 2, 1864 was about 7.4 °C. There was 0.5 mm of rain. The air pressure was 13 kgf/m2 and came mainly from the west-northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 62%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
May 9 » Second Schleswig War: The Danish navy defeats the Austrian and Prussian fleets in the Battle of Heligoland.
June 5 » American Civil War: Battle of Piedmont: Union forces under General David Hunter defeat a Confederate army at Piedmont, Virginia, taking nearly 1,000 prisoners.
June 29 » At least 99 people, mostly German and Polish immigrants, are killed in Canada's worst railway disaster after a train fails to stop for an open drawbridge and plunges into the Rivière Richelieu near St-Hilaire, Quebec.
September 18 » American Civil War: John Bell Hood begins the Franklin–Nashville Campaign in an unsuccessful attempt to draw William Tecumseh Sherman back out of Georgia.
September 19 » American Civil War: Union troops under Philip Sheridan defeat a Confederate force commanded by Jubal Early. With over 50,000 troops engaged, it was the largest battle fought in the Shenandoah Valley.
October 31 » Nevada is admitted as the 36th U.S. state.
Day of marriage December 21, 1889
The temperature on December 21, 1889 was about 4.3 °C. There was 7 mm of rain. The air pressure was 4 kgf/m2 and came mainly from the south-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 97%. Source: KNMI
January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
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.
July 11 » Tijuana, Mexico, is founded.
August 4 » The Great Fire of Spokane, Washington destroys some 32 blocks of the city, prompting a mass rebuilding project.
August 13 » William Gray of Hartford, Connecticut is granted United States Patent Number 408,709 for "Coin-controlled apparatus for telephones."
November 2 » North Dakota and South Dakota are admitted as the 39th and 40th U.S. states.
Day of death July 4, 1934
The temperature on July 4, 1934 was between 8.6 °C and 20.8 °C and averaged 14.5 °C. There was 10.8 hours of sunshine (65%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I193854.php : accessed January 5, 2026), "Pieter Koopmans (1864-1934)".
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