The temperature on November 23, 1927 was between -5.6 °C and -0.6 °C and averaged -3.7 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. 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 13 » Aviator Charles Lindbergh receives a ticker tape parade down 5th Avenue in New York City.
August 19 » Patriarch Sergius of Moscow proclaims the declaration of loyalty of the Russian Orthodox Church to the Soviet Union.
September 7 » The first fully electronic television system is achieved by Philo Farnsworth.
September 22 » Jack Dempsey loses the "Long Count" boxing match to Gene Tunney.
December 27 » Kern and Hammerstein's musical play Show Boat, considered to be the first true American musical play, opens at the Ziegfeld Theatre on Broadway.
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/I12041.php : accessed February 6, 2026), "Rudolph Petrus Gerhardus Dreyer (1927-2011)".
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