The temperature on October 13, 1884 was about 8.9 °C. There was 2 mm of rain. The air pressure was 2 kgf/m2 and came mainly from the northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 89%. 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 19 » More than sixty tornadoes strike the Southern United States, one of the largest tornado outbreaks in U.S. history.
May 1 » Moses Fleetwood Walker becomes the first black person to play in a professional baseball game in the United States.
May 31 » The arrival at Plymouth of Tāwhiao, King of Maoris, to claim the protection of Queen Victoria.
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.
December 6 » The Washington Monument in Washington, D.C., is completed.
Day of marriage May 9, 1910
The temperature on May 9, 1910 was between -0.1 °C and 12.4 °C and averaged 6.1 °C. There was 2.5 mm of rain. There was 4.4 hours of sunshine (29%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
April 16 » The oldest existing indoor ice hockey arena still used for the sport in the 21st century, Boston Arena, opens for the first time.
May 31 » The South Africa Act comes into force, establishing the Union of South Africa.
July 16 » John Robertson Duigan makes the first flight of the Duigan pusher biplane, the first aircraft built in Australia.
August 29 » The Japan–Korea Treaty of 1910, also known as the Japan–Korea Annexation Treaty, becomes effective, officially starting the period of Japanese rule in Korea.
September 22 » The Duke of York's Picture House opens in Brighton, now the oldest continually operating cinema in Britain.
October 1 » A large bomb destroys the Los Angeles Times building, killing 21.
Day of death August 12, 1969
The temperature on August 12, 1969 was between 14.3 °C and 27.0 °C and averaged 19.2 °C. There was 10.2 mm of rain during 3.8 hours. There was 6.8 hours of sunshine (46%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
March 13 » Apollo 9 returns safely to Earth after testing the Lunar Module.
March 19 » The 385-metre-tall (1,263ft) TV-mast at Emley Moor transmitting station, United Kingdom, collapses due to ice build-up.
April 4 » Dr. Denton Cooley implants the first temporary artificial heart.
July 30 » Vietnam War: US President Richard Nixon makes an unscheduled visit to South Vietnam and meets with President Nguyễn Văn Thiệu and U.S. military commanders.
October 8 » The opening rally of the Days of Rage occurs, organized by the Weather Underground in Chicago.
November 20 » Occupation of Alcatraz: Native American activists seize control of Alcatraz Island until being ousted by the U.S. Government on June 11, 1971.
When copying data from this family tree, please include a reference to the origin: Jan Willem Graafmans, "Family tree Graafmans", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-graafmans/R167.php : accessed January 9, 2026), "Helena Elisabeth de Jager (1884-1969)".
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