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 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
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 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, 1966
The temperature on July 21, 1966 was between 15.5 °C and 20.5 °C and averaged 16.8 °C. There was 8.0 mm of rain during 7.1 hours. There was 0.1 hours of sunshine (1%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
August 10 » The Heron Road Bridge collapses while being built, killing nine workers in the deadliest construction accident in both Ottawa and Ontario.
September 16 » The Metropolitan Opera House opens at Lincoln Center in New York City with the world premiere of Samuel Barber's opera Antony and Cleopatra.
October 22 » The Supremes become the first all-female music group to attain a No. 1 selling album (The Supremes A' Go-Go).
November 8 » U.S. President Lyndon B. Johnson signs into law an antitrust exemption allowing the National Football League to merge with the upstart American Football League.
November 28 » Michel Micombero overthrows the monarchy of Burundi and makes himself the first president.
December 27 » The Cave of Swallows, the largest known cave shaft in the world, is discovered in Aquismón, San Luis Potosí, Mexico.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I496611.php : accessed March 16, 2026), "Gerardus Josephus Lammens (1897-1966)".
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