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.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
December 6 » London becomes the world's first city to host licensed taxicabs.
Day of marriage July 6, 1922
The temperature on July 6, 1922 was between 11.1 °C and 20.3 °C and averaged 16.4 °C. There was 10.8 mm of rain. There was 0.3 hours of sunshine (2%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-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.
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 28 » Knickerbocker Storm, Washington D.C.'s biggest snowfall, causes the city's greatest loss of life when the roof of the Knickerbocker Theatre collapses.
February 8 » United States President Warren G. Harding introduces the first radio set in the White House.
March 10 » Mahatma Gandhi is arrested in India, tried for sedition, and sentenced to six years in prison, only to be released after nearly two years for an appendicitis operation.
September 27 » King Constantine I of Greece abdicates his throne in favor of his eldest son, George II.
November 1 » Abolition of the Ottoman sultanate: The last sultan of the Ottoman Empire, Mehmed VI, abdicates.
December 7 » The Parliament of Northern Ireland votes to remain a part of the United Kingdom and not unify with Southern Ireland.
Day of death December 19, 1959
The temperature on December 19, 1959 was between 1.8 °C and 8.0 °C and averaged 5.3 °C. There was 5.7 mm of rain during 6.8 hours. There was 3.3 hours of sunshine (43%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
June 14 » Dominican exiles depart from Cuba and land in the Dominican Republic to overthrow the totalitarian government of Rafael Trujillo. All but four are killed or executed.
July 7 » Venus occults the star Regulus. This rare event is used to determine the diameter of Venus and the structure of the Venusian atmosphere.
July 24 » At the opening of the American National Exhibition in Moscow, U.S. Vice President Richard Nixon and Soviet Premier Nikita Khrushchev have a "Kitchen Debate".
July 27 » The Continental League is announced as baseball's "3rd major league" in the United States.
September 18 » Vanguard 3 is launched into Earth orbit.
October 21 » President Eisenhower approves the transfer of all US Army space-related activities to NASA, including most of the Army Ballistic Missile Agency.
When copying data from this family tree, please include a reference to the origin: Sonja Assenberg-Staarthof, "Family tree Staarthof", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-staarthof/R409.php : accessed March 13, 2026), "Leentje Euser (1897-1959)".
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