The temperature on May 15, 1884 was about 13.5 °C. The air pressure was 17 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 67%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
February 1 » The first volume (A to Ant) of the Oxford English Dictionary is published.
March 13 » The Siege of Khartoum begins. It lasts until January 26, 1885.
March 27 » A mob in Cincinnati, Ohio, attacks members of a jury which had returned a verdict of manslaughter in what was seen as a clear case of murder; over the next few days the mob would riot and eventually destroy the courthouse.
June 16 » The first purpose-built roller coaster, LaMarcus Adna Thompson's "Switchback Railway", opens in New York's Coney Island amusement park.
July 5 » Germany takes possession of Cameroon.
October 6 » The Naval War College of the United States is founded in Rhode Island.
Day of marriage May 21, 1909
The temperature on May 21, 1909 was between 8.3 °C and 25.6 °C and averaged 17.8 °C. There was 13.7 hours of sunshine (86%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
January 25 » Richard Strauss's opera Elektra receives its debut performance at the Dresden State Opera.
February 2 » The Paris Film Congress opens. An attempt by European producers to form an equivalent to the MPCC cartel in the United States.
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
March 23 » Theodore Roosevelt leaves New York for a post-presidency safari in Africa. The trip is sponsored by the Smithsonian Institution and National Geographic Society.
April 14 » A massacre is organized by the Ottoman Empire against the Armenian population of Cilicia.
May 31 » The National Negro Committee, forerunner to the National Association for the Advancement of Colored People (NAACP), convenes for the first time.
When copying data from this family tree, please include a reference to the origin: Marjon Root, "Family tree Root, Brinksma, Van Schoten en Molen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-root/I7662.php : accessed January 2, 2026), "Arentje Kamer (1884-????)".
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