February 9 » William G. Morgan creates a game called Mintonette, which soon comes to be referred to as volleyball.
April 3 » The trial in the libel case brought by Oscar Wilde begins, eventually resulting in his imprisonment on charges of homosexuality.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
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 marriage May 19, 1920
The temperature on May 19, 1920 was between 8.1 °C and 15.3 °C and averaged 11.5 °C. There was 4.1 hours of sunshine (26%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 13 » The Reichstag Bloodbath of January 13, 1920, the bloodiest demonstration in German history.
April 23 » The Grand National Assembly of Turkey (TBMM) is founded in Ankara. The assembly denounces the government of Sultan Mehmed VI and announces the preparation of a temporary constitution.
July 11 » In the East Prussian plebiscite the local populace decides to remain with Weimar Germany.
August 15 » Polish–Soviet War: Battle of Warsaw, so-called Miracle at the Vistula.
August 20 » The first commercial radio station, 8MK (now WWJ), begins operations in Detroit.
November 21 » Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday".
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I89797.php : accessed February 27, 2026), "Catharina Jacoba Kauffman (1895-????)".
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