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.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage September 15, 1921
The temperature on September 15, 1921 was between 9.0 °C and 18.4 °C and averaged 14.3 °C. The average windspeed was 2 Bft (weak wind) 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.
January 20 » The first Constitution of Turkey is adopted, making fundamental changes in the source and exercise of sovereignty by consecrating the principle of national sovereignty.
March 1 » Following mass protests in Petrograd demanding greater freedom in the RSFSR, the Kronstadt rebellion began, with sailors and citizens taking up arms against the Bolsheviks.
March 1 » The Australian cricket team captained by Warwick Armstrong becomes the first team to complete a whitewash of The Ashes, something that would not be repeated for 86 years.
March 15 » Talaat Pasha, former Grand Vizir of the Ottoman Empire and chief architect of the Armenian Genocide is assassinated in Berlin by a 23-year-old Armenian, Soghomon Tehlirian.
May 3 » West Virginia becomes the first state to legislate a broad sales tax, but does not implement it until a number of years later due to enforcement issues.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
When copying data from this family tree, please include a reference to the origin: Kim Faaij-Straver, "Family tree Straver", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-straver/I418.php : accessed February 14, 2026), "Johannes Cornelis Bus (1897-????)".
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