January 13 » First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory.
April 3 » The trial in the libel case brought by Oscar Wilde begins, eventually resulting in his imprisonment on charges of homosexuality.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
December 28 » Wilhelm Röntgen publishes a paper detailing his discovery of a new type of radiation, which later will be known as x-rays.
Day of death April 21, 1950
The temperature on April 21, 1950 was between 4.0 °C and 16.4 °C and averaged 10.6 °C. There was 12.7 hours of sunshine (89%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 17 » Researchers at the University of California, Berkeley announce the creation of element 98, which they name "californium".
May 13 » The first round of the Formula One World Championship is held at Silverstone.
June 28 » Korean War: North Korean Army conducts the Seoul National University Hospital massacre.
July 5 » Korean War: Task Force Smith: American and North Korean forces first clash, in the Battle of Osan.
July 16 » Chaplain–Medic massacre: American POWs are massacred by North Korean Army.
November 8 » Korean War: United States Air Force Lt. Russell J. Brown, while piloting an F-80 Shooting Star, shoots down two North Korean MiG-15s in the first jet aircraft-to-jet aircraft dogfight in history.
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/I112192.php : accessed December 26, 2025), "Albertje "Ella" Bijleveld (1895-1950)".
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