The temperature on August 30, 1911 was between 8.1 °C and 20.6 °C and averaged 15.1 °C. There was 0.5 hours of sunshine (4%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 3 » A gun battle in the East End of London left two dead and sparked a political row over the involvement of then-Home Secretary Winston Churchill.
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.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
Day of marriage February 3, 1938
The temperature on February 3, 1938 was between 2.7 °C and 9.0 °C and averaged 6.7 °C. There was 2.4 mm of rain during 1.1 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
April 10 » The 1938 German parliamentary election and referendum seeks approval for a single list of Nazi candidates and the recent annexation of Austria.
July 3 » World speed record for a steam locomotive is set in England, by the Mallard, which reaches a speed of 125.88 miles per hour (202.58km/h).
July 20 » The United States Department of Justice files suit in New York City against the motion picture industry charging violations of the Sherman Antitrust Act in regards to the studio system. The case would eventually result in a break-up of the industry in 1948.
October 31 » Great Depression: In an effort to restore investor confidence, the New York Stock Exchange unveils a fifteen-point program aimed to upgrade protection for the investing public.
November 14 » The Lions Gate Bridge, connecting Vancouver to the North Shore region, opens to traffic.
December 17 » Otto Hahn discovers the nuclear fission of the heavy element uranium, the scientific and technological basis of nuclear energy.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I4387.php : accessed January 31, 2026), "Hermanus Bernardus Antonius Keijsper (1911-)".
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