The temperature on November 11, 1911 was between 2.2 °C and 7.9 °C and averaged 4.9 °C. There was 1.3 mm of rain. There was 2.9 hours of sunshine (32%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
When copying data from this family tree, please include a reference to the origin: E.A. Harmsen, "Family tree Harmsen-de Vries", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-harmsen-de-vries/I64777.php : accessed May 15, 2024), "Hendrika Hoffmann (1911-)".
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