The temperature on June 11, 1930 was between 10.7 °C and 21.4 °C and averaged 15.5 °C. There was 7.6 hours of sunshine (46%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. 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 30 » The Politburo of the Soviet Union orders the extermination of the Kulaks.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
April 22 » The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
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.
November 11 » Patent number US1781541 is awarded to Albert Einstein and Leó Szilárd for their invention, the Einstein refrigerator.
Day of death March 18, 1996
The temperature on March 18, 1996 was between 3.2 °C and 7.8 °C and averaged 4.9 °C. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
January 27 » In a military coup, Colonel Ibrahim Baré Maïnassara deposes the first democratically elected president of Niger, Mahamane Ousmane.
March 13 » The Dunblane massacre leads to the death of sixteen primary school children and one teacher in Dunblane, Scotland.
June 4 » The first flight of Ariane 5 explodes after roughly 37 seconds. It was a Cluster mission.
June 15 » The Troubles: The Provisional Irish Republican Army (IRA) detonates a powerful truck bomb in the middle of Manchester, England, devastating the city centre and injuring 200 people.
July 15 » A Belgian Air Force C-130 Hercules carrying the Royal Netherlands Army marching band crashes on landing at Eindhoven Airport.
December 30 » Proposed budget cuts by Benjamin Netanyahu spark protests from 250,000 workers who shut down services across Israel.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I18683.php : accessed January 31, 2026), "Klaas Hendrik den Hartigh (1930-1996)".
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