The temperature on September 23, 1912 was between 4.2 °C and 16.6 °C and averaged 10.5 °C. There was 9.0 hours of sunshine (74%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
April 17 » Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150.
July 8 » Henrique Mitchell de Paiva Couceiro leads an unsuccessful royalist attack against the First Portuguese Republic in Chaves.
October 3 » U.S. forces defeat Nicaraguan rebels at the Battle of Coyotepe Hill.
November 19 » First Balkan War: The Serbian Army captures Bitola, ending the five-century-long Ottoman rule of Macedonia.
Day of death July 26, 1968
The temperature on July 26, 1968 was between 12.3 °C and 19.9 °C and averaged 15.7 °C. There was 6.2 hours of sunshine (39%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
January 22 » Apollo 5 lifts off carrying the first Lunar module into space.
June 11 » Lloyd J. Old identified the first cell surface antigens that could differentiate among different cell types.
August 21 » Cold War: Nicolae Ceaușescu, leader of Communist Romania, publicly condemns the Soviet-led Warsaw Pact invasion of Czechoslovakia, encouraging the Romanian population to arm itself against possible Soviet reprisals.
November 5 » Richard Nixon is elected as 37th President of the United States.
December 11 » The Rolling Stones Rock and Roll Circus, featuring the Rolling Stones, Jethro Tull, the Who, Taj Mahal, Marianne Faithfull, and the Dirty Mac with Yoko Ono, is filmed in Wembley, London.
December 27 » Apollo program: Apollo 8 splashes down in the Pacific Ocean, ending the first orbital manned mission to the Moon.
When copying data from this family tree, please include a reference to the origin: Nico de Kunder, "Family tree De Kunder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-kunder/I5985.php : accessed December 29, 2025), "Petronella Jacoba Smits (1912-1968)".
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