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 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
Day of marriage July 26, 1921
The temperature on July 26, 1921 was between 12.7 °C and 25.4 °C and averaged 19.6 °C. There was 12.7 hours of sunshine (80%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
March 19 » Irish War of Independence: One of the biggest engagements of the war takes place at Crossbarry, County Cork. About 100 Irish Republican Army (IRA) volunteers escape an attempt by over 1,300 British forces to encircle them.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
Day of death November 29, 1969
The temperature on November 29, 1969 was between -1.3 °C and 5.5 °C and averaged 1.8 °C. There was 4.0 mm of rain during 3.4 hours. There was 1.3 hours of sunshine (16%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
April 17 » Communist Party of Czechoslovakia chairman Alexander Dubček is deposed.
May 26 » Apollo program: Apollo 10 returns to Earth after a successful eight-day test of all the components needed for the forthcoming first manned moon landing.
June 3 » Melbourne–Evans collision: off the coast of South Vietnam, the Australian aircraft carrier HMASMelbourne cuts the U.S. Navy destroyer USSFrank E. Evans in half.
August 7 » Richard Nixon appoints Luis R. Bruce, a Mohawk-Oglala Sioux and co-founder of the National Congress of American Indians, as the new commissioner of the Bureau of Indian Affairs.
September 25 » The charter establishing the Organisation of Islamic Cooperation is signed.
October 17 » The Caravaggio painting Nativity with St. Francis and St. Lawrence is stolen from the Oratory of Saint Lawrence in Palermo.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I93355.php : accessed October 21, 2026), "Grietje Stelstra (1897-1969)".
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