The temperature on May 4, 1927 was between 8.7 °C and 24.4 °C and averaged 17.2 °C. There was 10.7 hours of sunshine (71%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. 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.
July 4 » First flight of the Lockheed Vega.
July 15 » Massacre of July 15, 1927: Eighty-nine protesters are killed by the Austrian police in Vienna.
August 23 » Italian anarchists Sacco and Vanzetti are executed after a lengthy, controversial trial.
September 18 » The Columbia Broadcasting System goes on the air.
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.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I77977.php : accessed February 26, 2026), "Adriëtta Maria Nahuijsen (1903-)".
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