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 » Dracula, a Gothic horror novel by Irish author Bram Stoker, is published.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
December 30 » The British Colony of Natal annexes Zululand.
Day of death July 21, 1957
The temperature on July 21, 1957 was between 9.5 °C and 19.9 °C and averaged 15.2 °C. There was 5.9 hours of sunshine (37%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
January 23 » American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
March 8 » The 1957 Georgia Memorial to Congress, which petitions the U.S. Congress to declare the ratification of the 14th and 15th Amendments to the U.S. Constitution null and void, is adopted by the U.S. state of Georgia.
June 9 » First ascent of Broad Peak by Fritz Wintersteller, Marcus Schmuck, Kurt Diemberger, and Hermann Buhl.
July 6 » Althea Gibson wins the Wimbledon championships, becoming the first black athlete to do so.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
November 8 » Pan Am Flight 7 disappears between San Francisco and Honolulu. Wreckage and bodies are discovered a week later.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I63015.php : accessed February 20, 2026), "Anna Engelina Meijer (1897-1957)".
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