The temperature on April 28, 1871 was about 9.7 °C. There was 0.1 mm of rain. The air pressure was 1 kgf/m2 and came mainly from the west-southwest. The atmospheric humidity was 92%. Source: KNMI
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
In The Netherlands , there was from January 4, 1871 to July 6, 1872 the cabinet Thorbecke III, with Mr. J.R. Thorbecke (liberaal) as prime minister.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
Day of death July 31, 1952
The temperature on July 31, 1952 was between 12.5 °C and 22.5 °C and averaged 16.7 °C. There was 4.7 hours of sunshine (30%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
March 10 » Fulgencio Batista leads a successful coup in Cuba.
May 7 » The concept of the integrated circuit, the basis for all modern computers, is first published by Geoffrey Dummer.
October 14 » Korean War: The Battle of Triangle Hill is the biggest and bloodiest battle of 1952.
October 20 » The Governor of Kenya declares a state of emergency and begins arresting hundreds of suspected leaders of the Mau Mau Uprising.
November 19 » Greek Field Marshal Alexander Papagos becomes the 152nd Prime Minister of Greece.
November 29 » Korean War: U.S. President-elect Dwight D. Eisenhower fulfills a campaign promise by traveling to Korea to find out what can be done to end the conflict.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I64429.php : accessed January 14, 2026), "Leonardus Onderwater (1871-1952)".
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