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.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
December 30 » The British Colony of Natal annexes Zululand.
Day of death November 19, 1918
The temperature on November 19, 1918 was between -0.2 °C and 10.3 °C and averaged 4.6 °C. There was 0.2 mm of rain. There was 3.9 hours of sunshine (45%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
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.
March 30 » Outburst of bloody March Events in Baku and other locations of Baku Governorate.
May 9 » World War I: Germany repels Britain's second attempt to blockade the port of Ostend, Belgium.
August 13 » Women enlist in the United States Marine Corps for the first time. Opha May Johnson is the first woman to enlist.
October 29 » The German High Seas Fleet is incapacitated when sailors mutiny on the night of the 29th-30th, an action which would trigger the German Revolution of 1918–19.
November 11 » Józef Piłsudski assumes supreme military power in Poland - symbolic first day of Polish independence.
November 25 » Vojvodina, formerly Austro-Hungarian crown land, proclaims its secession from Austria–Hungary to join the Kingdom of Serbia.
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/I16116.php : accessed October 17, 2026), "Klaas Nicolai (1897-1918)".
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