The temperature on August 17, 1927 was between 10.4 °C and 20.4 °C and averaged 15.2 °C. There was 0.6 mm of rain. There was 11.4 hours of sunshine (78%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
April 27 » Carabineros de Chile (Chilean national police force and gendarmerie) are created.
May 20 » Treaty of Jeddah: The United Kingdom recognizes the sovereignty of King Ibn Saud in the Kingdoms of Hejaz and Nejd, which later merge to become the Kingdom of Saudi Arabia.
August 16 » The Dole Air Race begins from Oakland, California, to Honolulu, Hawaii, during which six out of the eight participating planes crash or disappear.
November 12 » Leon Trotsky is expelled from the Soviet Communist Party, leaving Joseph Stalin in undisputed control of the Soviet Union.
December 3 » Putting Pants on Philip, the first Laurel and Hardy film, is released.
When copying data from this family tree, please include a reference to the origin: Erik Wiersma, "Family tree Wiersma / Bergkamp / Dekkers / Smit", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wiersma/I3507.php : accessed May 31, 2024), "Hendrikus Mattheus Koster (1900-)".
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