The temperature on March 10, 1886 was about -3.7 °C. The air pressure was 10 kgf/m2 and came mainly from the east-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 72%. 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.
January 18 » Modern field hockey is born with the formation of The Hockey Association in England.
January 29 » Karl Benz patents the first successful gasoline-driven automobile.
March 1 » The Anglo-Chinese School, Singapore is founded by Bishop William Oldham.
May 4 » Haymarket affair: A bomb is thrown at policemen trying to break up a labor rally in Chicago, United States, killing eight and wounding 60. The police fire into the crowd.
June 26 » Henri Moissan isolated elemental Fluorine for the first time.
October 28 » President Cleveland dedicates the Statue of Liberty.
Day of death May 17, 1961
The temperature on May 17, 1961 was between 7.5 °C and 17.0 °C and averaged 13.0 °C. There was 7.4 hours of sunshine (47%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
January 8 » In France a referendum supports Charles de Gaulle's policies in Algeria.
February 14 » Discovery of the chemical elements: Element 103, Lawrencium, is first synthesized at the University of California.
February 15 » Sabena Flight 548 crashes in Belgium, killing 73, including the entire United States figure skating team along with several of their coaches and family members.
July 25 » Cold War: In a speech John F. Kennedy emphasizes that any attack on Berlin is an attack on NATO.
August 10 » Vietnam War: The U.S. Army begins Operation Ranch Hand, spraying an estimated 20million US gallons (76,000m) of defoliants and herbicides over rural areas of South Vietnam in an attempt to deprive the Viet Cong of food and vegetation cover.
September 17 » The world's first retractable roof stadium, the Civic Arena, opens in Pittsburgh, Pennsylvania.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I13790.php : accessed October 4, 2026), "Emma Valkaert (1886-1961)".
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