January 12 » The National Trust is founded in the United Kingdom.
April 24 » Joshua Slocum, the first person to sail single-handedly around the world, sets sail from Boston, Massachusetts aboard the sloop "Spray".
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
August 31 » German Count Ferdinand von Zeppelin patents his navigable balloon.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
Day of death May 28, 1950
The temperature on May 28, 1950 was between 9.2 °C and 14.1 °C and averaged 11.2 °C. There was 3.0 mm of rain during 2.5 hours. There was 7.8 hours of sunshine (48%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. 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).
January 14 » The first prototype of the MiG-17 makes its maiden flight.
February 9 » Second Red Scare: US Senator Joseph McCarthy accuses the United States Department of State of being filled with Communists.
May 5 » Bhumibol Adulyadej is crowned as King of Thailand.
June 28 » Korean War: Suspected communist sympathizers (between 60,000 to 200,000) are executed in the Bodo League massacre.
September 26 » Korean War: United Nations troops recapture Seoul from North Korean forces.
October 11 » CBS's field-sequential color system for television is the first to be licensed for broadcast by the U.S. Federal Communications Commission.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I14178.php : accessed January 26, 2026), "Jan Barend du Plessies (1866-1950)".
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