The temperature on August 18, 1884 was about 20.7 °C. The air pressure was 1 kgf/m2 and came mainly from the east-southeast. The airpressure was 76 cm mercury. The atmospheric humidity was 76%. 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.
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.
May 31 » The arrival at Plymouth of Tāwhiao, King of Maoris, to claim the protection of Queen Victoria.
July 5 » Germany takes possession of Cameroon.
October 13 » The International Meridian Conference establishes the meridian of the Greenwich Observatory as the prime meridian.
October 22 » The International Meridian Conference designates the Royal Observatory, Greenwich as the world's prime meridian.
December 6 » The Washington Monument in Washington, D.C., is completed.
Day of marriage November 16, 1904
The temperature on November 16, 1904 was between -2.4 °C and 5.8 °C and averaged 2.6 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
January 7 » The distress signal "CQD" is established only to be replaced two years later by "SOS".
April 8 » Longacre Square in Midtown Manhattan is renamed Times Square after The New York Times.
August 10 » Russo-Japanese War: The Battle of the Yellow Sea between the Russian and Japanese battleship fleets takes place.
October 27 » The first underground New York City Subway line opens, later designated as the IRT Broadway–Seventh Avenue Line.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
December 3 » The Jovian moon Himalia is discovered by Charles Dillon Perrine at California's Lick Observatory.
Day of death August 17, 1954
The temperature on August 17, 1954 was between 8.7 °C and 20.7 °C and averaged 15.3 °C. There was 0.1 mm of rain. There was 9.3 hours of sunshine (64%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 7 » Georgetown-IBM experiment: The first public demonstration of a machine translation system is held in New York at the head office of IBM.
February 18 » The first Church of Scientology is established in Los Angeles.
March 1 » Nuclear weapons testing: The Castle Bravo, a 15-megaton hydrogen bomb, is detonated on Bikini Atoll in the Pacific Ocean, resulting in the worst radioactive contamination ever caused by the United States.
August 15 » Alfredo Stroessner begins his dictatorship in Paraguay.
September 29 » The convention establishing CERN (the European Organization for Nuclear Research) is signed.
November 19 » Télé Monte Carlo, Europe's oldest private television channel, is launched by Prince Rainier III.
When copying data from this family tree, please include a reference to the origin: Peter Keesman, "Family tree Keesman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-keesman/I9263.php : accessed February 17, 2026), "Margaretha Hendrika Mortel (1884-1954)".
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