The temperature on July 31, 1919 was between 10.8 °C and 18.5 °C and averaged 14.2 °C. There was 4.0 hours of sunshine (26%). The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 15 » Great Molasses Flood: A wave of molasses released from an exploding storage tank sweeps through Boston, Massachusetts, killing 21 and injuring 150.
January 18 » Ignacy Jan Paderewski becomes Prime Minister of the newly independent Poland.
January 18 » World War I: The Paris Peace Conference opens in Versailles, France.
July 11 » The eight-hour day and free Sunday become law for workers in the Netherlands.
July 13 » The British airship R34 lands in Norfolk, England, completing the first airship return journey across the Atlantic in 182 hours of flight.
October 9 » The Cincinnati Reds win the World Series, resulting in the Black Sox Scandal.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I15530.php : accessed January 23, 2026), "Roelof Petrus Gerhardus Klopper (1844-1919)".
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