April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
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.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
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).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
Day of marriage December 12, 1923
The temperature on December 12, 1923 was between -4.0 °C and 3.6 °C and averaged -0.1 °C. There was 1.3 hours of sunshine (17%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 1 » Britain's Railways are grouped into the Big Four: LNER, GWR, SR, and LMS.
March 20 » The Arts Club of Chicago hosts the opening of Pablo Picasso's first United States showing, entitled Original Drawings by Pablo Picasso, becoming an early proponent of modern art in the United States.
June 18 » Checker Taxi puts its first taxi on the streets.
September 1 » The Great Kantō earthquake devastates Tokyo and Yokohama, killing about 105,000 people.
November 9 » In Munich, Germany, police and government troops crush the Beer Hall Putsch in Bavaria. The failed coup is the work of the Nazis.
December 21 » United Kingdom and Nepal formally signed an agreement of friendship, called the Nepal–Britain Treaty of 1923, which superseded the Treaty of Sugauli signed in 1816.
Day of death July 20, 1964
The temperature on July 20, 1964 was between 12.6 °C and 24.7 °C and averaged 19.1 °C. There was 8.4 hours of sunshine (52%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
June 2 » The Palestine Liberation Organization (PLO) is formed.
June 21 » Three civil rights workers, Andrew Goodman, James Chaney and Michael Schwerner, are murdered in Neshoba County, Mississippi, United States, by members of the Ku Klux Klan.
June 28 » Malcolm X forms the Organization of Afro-American Unity.
July 2 » Civil rights movement: U.S. President Lyndon B. Johnson signs the Civil Rights Act of 1964 meant to prohibit segregation in public places.
November 21 » Second Vatican Council: The third session of the Roman Catholic Church's ecumenical council closes.
December 5 » Lloyd J. Old discovered the first linkage between the major histocompatibility complex (MHC) and disease—mouse leukemia—opening the way for the recognition of the importance of the MHC in the immune response.
When copying data from this family tree, please include a reference to the origin: Ph. Schmit, "Family tree Schmit", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-schmit/I1323.php : accessed February 5, 2026), "Gijsje Bertha Grootendorst (1897-1964)".
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