The temperature on January 30, 1911 was between -4.4 °C and 2.2 °C and averaged -1.6 °C. There was 7.0 hours of sunshine (78%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of marriage May 30, 1936
The temperature on May 30, 1936 was between 5.8 °C and 14.8 °C and averaged 10.6 °C. There was 2.7 mm of rain during 2.3 hours. There was 2.0 hours of sunshine (12%). The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I122294.php : accessed October 24, 2026), "Jelte van der Kooi (1911-)".
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