The temperature on November 19, 1927 was between -1.0 °C and 2.2 °C and averaged 1.0 °C. There was 1.1 mm of rain. The average windspeed was 5 Bft (very strong wind) and was prevailing from the east. 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.
June 26 » The Cyclone roller coaster opens on Coney Island.
November 12 » Leon Trotsky is expelled from the Soviet Communist Party, leaving Joseph Stalin in undisputed control of the Soviet Union.
December 8 » The Brookings Institution, one of the United States' oldest think tanks, is founded through the merger of three organizations that had been created by philanthropist Robert S. Brookings.
December 17 » Indian revolutionary Rajendra Lahiri is hanged in Gonda jail, Uttar Pradesh, India, two days before the scheduled date.
December 19 » Three Indian revolutionaries, Ram Prasad Bismil, Roshan Singh and Ashfaqulla Khan, are executed by the British Raj for participation in the Kakori conspiracy.
When copying data from this family tree, please include a reference to the origin: Hans Middendorp, "Family Tree Family tree Kraster uit de Kalkwijk bij Sappemeer in Groningen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kraster/I17002.php : accessed January 17, 2026), "Harm Zijlstra (1905-)".
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