The temperature on June 6, 1869 was about 23.2 °C. The air pressure was 3 kgf/m2 and came mainly from the west by south. The airpressure was 77 cm mercury. The atmospheric humidity was 58%. Source: KNMI
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
January 1 » The first American college football bowl game, the Rose Bowl between Michigan and Stanford, is held in Pasadena, California.
March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
April 20 » Pierre and Marie Curie refine radium chloride.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
August 22 » Cadillac Motor Company is founded.
Day of death February 1, 1949
The temperature on February 1, 1949 was between -1.9 °C and 4.3 °C and averaged 1.1 °C. There was 0.1 mm of rain during 0.2 hours. There was 2.2 hours of sunshine (24%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
January 5 » In his "State of the Union" address, United States President Harry S. Truman unveils his Fair Deal program.
January 26 » The Hale telescope at Palomar Observatory sees first light under the direction of Edwin Hubble, becoming the largest aperture optical telescope (until BTA-6 is built in 1976).
March 2 » Captain James Gallagher lands his B-50 Superfortress Lucky Lady II in Fort Worth, Texas, after completing the first non-stop around-the-world airplane flight in 94 hours and one minute.
June 14 » Albert II, a rhesus monkey, rides a V-2 rocket to an altitude of 134km (83mi), thereby becoming the first monkey in space.
September 27 » Zeng Liansong's design is chosen as the flag of the People's Republic of China.
December 2 » Convention for the Suppression of the Traffic in Persons and of the Exploitation of the Prostitution of Others is adopted.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I409087.php : accessed March 2, 2026), "Johannes Theodorus Daniel Groels (1869-1949)".
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