The temperature on February 18, 1923 was between -9.8 °C and -0.8 °C and averaged -4.8 °C. There was 1.0 mm of rain. There was 4.3 hours of sunshine (43%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the east-southeast. 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.
January 9 » Juan de la Cierva makes the first autogyro flight.
February 10 » Texas Tech University is founded as Texas Technological College in Lubbock, Texas
February 15 » Greece becomes the last European country to adopt the Gregorian calendar.
September 9 » Mustafa Kemal Atatürk, the founder of the Republic of Turkey, founds the Republican People's Party.
September 12 » Southern Rhodesia, today called Zimbabwe, is annexed by the United Kingdom.
Day of death April 28, 1930
The temperature on April 28, 1930 was between 10.3 °C and 21.8 °C and averaged 15.8 °C. There was 10.3 hours of sunshine (70%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 18 » Elm Farm Ollie becomes the first cow to fly in a fixed-wing aircraft and also the first cow to be milked in an aircraft.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
July 7 » Industrialist Henry J. Kaiser begins construction of Boulder Dam (now known as Hoover Dam).
July 30 » In Montevideo, Uruguay wins the first FIFA World Cup.
September 27 » Bobby Jones wins the (pre-Masters) Grand Slam of golf.
When copying data from this family tree, please include a reference to the origin: Rob Slotemaker, "Family tree Slotemaker", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-slotemaker/I882.php : accessed February 11, 2026), "Coenraad Slotemaker (1923-1930)".
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