The temperature on August 21, 1930 was between 12.0 °C and 21.6 °C and averaged 16.4 °C. There was 13.6 mm of rain during 2.1 hours. There was 1.8 hours of sunshine (13%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 6 » The first diesel-powered automobile trip is completed, from Indianapolis, Indiana, to New York, New York.
February 18 » While studying photographs taken in January, Clyde Tombaugh discovers Pluto.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
May 7 » The 7.1 Mw Salmas earthquake shakes northwestern Iran and southeastern Turkey with a maximum Mercalli intensity of IX (Violent). Up to three-thousand people were killed.
July 7 » Industrialist Henry J. Kaiser begins construction of Boulder Dam (now known as Hoover Dam).
September 27 » Bobby Jones wins the (pre-Masters) Grand Slam of golf.
When copying data from this family tree, please include a reference to the origin: Wim Helsdingen, "Family tree Helsdingen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-helsdingen/I952.php : accessed March 5, 2026), "Gerardus Johannes Helsdingen (1909-)".
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