January 28 » The Carnegie Institution of Washington is founded in Washington, D.C. with a $10 million gift from Andrew Carnegie.
March 6 » Real Madrid CF is founded.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
June 28 » The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
Day of marriage February 20, 1930
The temperature on February 20, 1930 was between -3.1 °C and 7.9 °C and averaged 1.3 °C. There was 4.1 hours of sunshine (40%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-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.
January 30 » The Politburo of the Soviet Union orders the extermination of the Kulaks.
January 31 » 3M begins marketing Scotch Tape.
February 16 » The Romanian Football Federation joins FIFA.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
May 7 » The 7.1 Mw Salmas earthquake shakes northwestern Iran and southeastern Turkey with a maximum Mercalli intensity of IX (Violent). Up to three-thousand people were killed.
October 5 » British airship R101 crashes in France en route to India on its maiden voyage.
Day of death October 27, 1950
The temperature on October 27, 1950 was between -5.0 °C and 5.2 °C and averaged -0.4 °C. There was 6.2 hours of sunshine (62%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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).
When copying data from this family tree, please include a reference to the origin: Christiaan, "Stambomen Straathof & Verdegaal", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-straathof-rijkelijkhuizen/I15289.php : accessed August 10, 2025), "Marius Theodorus Heemskerk (1902-1950)".
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