The temperature on February 2, 1884 was about 5.9 °C. The air pressure was 2 kgf/m2 and came mainly from the south-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 82%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
May 1 » Moses Fleetwood Walker becomes the first black person to play in a professional baseball game in the United States.
July 3 » Dow Jones & Company publishes its first stock average.
October 6 » The Naval War College of the United States is founded in Rhode Island.
October 13 » The International Meridian Conference establishes the meridian of the Greenwich Observatory as the prime meridian.
October 14 » George Eastman receives a U.S. Government patent on his new paper-strip photographic film.
December 10 » Mark Twain's Adventures of Huckleberry Finn is published.
Day of marriage September 8, 1910
The temperature on September 8, 1910 was between 7.5 °C and 18.5 °C and averaged 12.9 °C. There was 0.3 mm of rain. There was 3.8 hours of sunshine (29%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
May 11 » An act of the U.S. Congress establishes Glacier National Park in Montana.
June 17 » Aurel Vlaicu pilots an A. Vlaicu nr. 1 on its first flight.
July 4 » The Johnson–Jeffries riots occur after African-American boxer Jack Johnson knocks out white boxer Jim Jeffries in the 15th round. Between 11 and 26 people are killed and hundreds more injured.
October 5 » In a revolution in Portugal the monarchy is overthrown and a republic is declared.
October 11 » Piloted by Arch Hoxsey, Theodore Roosevelt becomes the first U.S. president to fly in an airplane.
October 22 » Hawley Harvey Crippen (the first felon to be arrested with the help of radio) is convicted of poisoning his wife.
Day of death April 24, 1959
The temperature on April 24, 1959 was between 3.5 °C and 16.3 °C and averaged 10.8 °C. There was 12.1 hours of sunshine (84%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I360682.php : accessed February 15, 2026), "Johan Herman Koop (1884-1959)".
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