The temperature on May 26, 1904 was between 9.9 °C and 27.0 °C and averaged 20.1 °C. There was 6.5 hours of sunshine (40%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
February 8 » Aceh War: Dutch Colonial Army's Marechaussee regiment led by General G.C.E. van Daalen launch military campaign to capture Gayo Highland, Alas Highland, and Batak Highland in Dutch East Indies' Northern Sumatra region, which ends with genocide to Acehnese and Bataks people.
February 22 » The United Kingdom sells a meteorological station on the South Orkney Islands to Argentina; the islands are subsequently claimed by the United Kingdom in 1908.
May 9 » The steam locomotive City of Truro becomes the first steam engine in Europe to exceed 100mph (160km/h).
May 15 » Russo-Japanese War: The Russian minelayer Amur lays a minefield about 15 miles off Port Arthur and sinks Japan's battleships Hatsuse, 15,000 tons, with 496 crew and Yashima.
October 4 » The IFK Göteborg football club is founded in Sweden.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
Day of marriage May 19, 1938
The temperature on May 19, 1938 was between 3.9 °C and 12.5 °C and averaged 8.4 °C. There was 1.0 mm of rain during 0.7 hours. There was 1.8 hours of sunshine (11%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
March 18 » Mexico creates Pemex by expropriating all foreign-owned oil reserves and facilities.
June 23 » The Civil Aeronautics Act is signed into law, forming the Civil Aeronautics Authority in the United States.
July 3 » United States President Franklin D. Roosevelt dedicates the Eternal Light Peace Memorial and lights the eternal flame at Gettysburg Battlefield.
July 3 » World speed record for a steam locomotive is set in England, by the Mallard, which reaches a speed of 125.88 miles per hour (202.58km/h).
September 21 » The Great Hurricane of 1938 makes landfall on Long Island in New York. The death toll is estimated at 500–700 people.
October 14 » The first flight of the Curtiss P-40 Warhawk fighter plane.
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I1377.php : accessed September 27, 2026), "JOHANNES de GROOT (1904-)".
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