The temperature on September 7, 1869 was about 19.1 °C. There was 0.3 mm of rain. The air pressure was 4 kgf/m2 and came mainly from the south-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 85%. 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).
March 6 » Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society.
April 6 » Celluloid is patented.
April 28 » Chinese and Irish laborers for the Central Pacific Railroad working on the First Transcontinental Railroad lay ten miles of track in one day, a feat which has never been matched.
May 26 » Boston University is chartered by the Commonwealth of Massachusetts.
July 10 » Gävle, Sweden, is largely destroyed in a fire; 80% of its 10,000 residents are left homeless.
August 16 » Battle of Acosta Ñu: A Paraguayan battalion made up of children is massacred by the Brazilian Army during the Paraguayan War.
Day of marriage June 29, 1901
The temperature on June 29, 1901 was between 10.0 °C and 22.7 °C and averaged 17.0 °C. There was 13.4 hours of sunshine (80%). Source: KNMI
May 9 » Australia opens its first national parliament in Melbourne.
August 10 » The U.S. Steel recognition strike by the Amalgamated Association of Iron and Steel Workers begins.
August 28 » Silliman University is founded in the Philippines. It is the first American private school in the country.
September 6 » Leon Czolgosz, an unemployed anarchist, shoots and fatally wounds US President William McKinley at the Pan-American Exposition in Buffalo, New York.
September 7 » The Boxer Rebellion in Qing dynasty (modern-day China) officially ends with the signing of the Boxer Protocol.
September 28 » Philippine–American War: Filipino guerrillas kill more than forty American soldiers while losing 28 of their own.
Day of death August 30, 1931
The temperature on August 30, 1931 was between 11.9 °C and 20.6 °C and averaged 16.7 °C. There was 2.2 hours of sunshine (16%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. 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.
When copying data from this family tree, please include a reference to the origin: Reint Wever, "Family tree Wever", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wever/R1809.php : accessed February 13, 2026), "Koert Olthof (1869-1931)".
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