The temperature on February 23, 1947 was between -12.3 °C and -2.5 °C and averaged -6.6 °C. There was 1.2 mm of rain during 8.0 hours. There was 5.3 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
September 9 » First case of a computer bug being found: A moth lodges in a relay of a Harvard Mark II computer at Harvard University.
October 1 » The North American F-86 Sabre flies for the first time.
October 14 » Chuck Yeager becomes the first person to exceed the speed of sound.
November 17 » American scientists John Bardeen and Walter Houser Brattain observe the basic principles of the transistor, a key element for the electronics revolution of the 20th century.
November 25 » New Zealand ratifies the Statute of Westminster and thus becomes independent of legislative control by the United Kingdom.
November 30 » Civil War in Mandatory Palestine begins, leading up to the creation of the state of Israel.
When copying data from this family tree, please include a reference to the origin: Van Traa, "Family tree Van Traa", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-traa/I488.php : accessed January 6, 2026), "Ingrid Ionna van Traa (1947-)".
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