The temperature on September 25, 1881 was about 14.9 °C. The air pressure was 3 kgf/m2 and came mainly from the south-southeast. The airpressure was 77 cm mercury. The atmospheric humidity was 65%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
February 24 » China and Russia sign the Sino-Russian Ili Treaty.
April 28 » Billy the Kid escapes from the Lincoln County jail in Mesilla, New Mexico.
May 12 » In North Africa, Tunisia becomes a French protectorate.
June 28 » The Austro–Serbian Alliance of 1881 is secretly signed.
July 2 » Charles J. Guiteau shoots and fatally wounds U.S. President James A. Garfield (who will die of complications from his wounds on September 19).
November 3 » The Mapuche uprising of 1881 begins in Chile.
Day of marriage May 12, 1910
The temperature on May 12, 1910 was between 7.9 °C and 20.6 °C and averaged 14.2 °C. There was 13.0 hours of sunshine (84%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
April 12 » SMSZrínyi, one of the last pre-dreadnought battleships built by the Austro-Hungarian Navy, is launched.
May 6 » George V becomes King of Great Britain, Ireland, and many overseas territories, on the death of his father, Edward VII.
August 29 » The Japan–Korea Treaty of 1910, also known as the Japan–Korea Annexation Treaty, becomes effective, officially starting the period of Japanese rule in Korea.
October 1 » A large bomb destroys the Los Angeles Times building, killing 21.
November 7 » The first air freight shipment (from Dayton, Ohio, to Columbus, Ohio) is undertaken by the Wright brothers and department store owner Max Moorehouse.
November 20 » Mexican Revolution: Francisco I. Madero issues the Plan de San Luis Potosí, denouncing Mexican President Porfirio Díaz, calling for a revolution to overthrow the government of Mexico, effectively starting the Mexican Revolution.
Day of death January 5, 1941
The temperature on January 5, 1941 was between -6.2 °C and -3.3 °C and averaged -5.2 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I3749.php : accessed October 25, 2026), "WILLEM IVO OPSTELTEN (1881-1941)".
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