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.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
December 30 » The British Colony of Natal annexes Zululand.
Day of death July 31, 1967
The temperature on July 31, 1967 was between 16.9 °C and 27.0 °C and averaged 21.5 °C. There was 0.1 mm of rain during 0.1 hours. There was 8.8 hours of sunshine (56%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
February 4 » Lunar Orbiter program: Lunar Orbiter 3 lifts off from Cape Canaveral's Launch Complex 13 on its mission to identify possible landing sites for the Surveyor and Apollo spacecraft.
February 13 » American researchers discover the Madrid Codices by Leonardo da Vinci in the National Library of Spain.
June 9 » Six-Day War: Israel captures the Golan Heights from Syria.
August 24 » Led by Abbie Hoffman, the Youth International Party temporarily disrupts trading at the New York Stock Exchange by throwing dollar bills from the viewing gallery, causing trading to cease as brokers scramble to grab them.
November 22 » UN Security Council Resolution 242 is adopted, establishing a set of the principles aimed at guiding negotiations for an Arab–Israeli peace settlement.
December 3 » At Groote Schuur Hospital in Cape Town, South Africa, a transplant team headed by Christiaan Barnard carries out the first heart transplant on a human (53-year-old Louis Washkansky).
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/I22029.php : accessed October 8, 2026), "Beitske Tjoelker (1897-1967)".
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