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 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of death December 13, 1918
The temperature on December 13, 1918 was between 9.0 °C and 11.5 °C and averaged 10.1 °C. There was 2.1 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. 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.
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The Family tree Van Leeuwen publication was prepared by L.H.van Leeuwen (contact is not possible).
When copying data from this family tree, please include a reference to the origin: L.H.van Leeuwen, "Family tree Van Leeuwen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-leeuwen/I2596.php : accessed May 4, 2025), "Hendrik Johannes Burger (1897-1918)".
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