The temperature on September 2, 1911 was between 9.5 °C and 29.2 °C and averaged 19.3 °C. There was 11.2 hours of sunshine (82%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
January 21 » The first Monte Carlo Rally takes place.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
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.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
June 22 » George V and Mary of Teck are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
Day of death September 21, 1911
The temperature on September 21, 1911 was between 6.0 °C and 15.7 °C and averaged 12.3 °C. There was 1.6 mm of rain. There was 3.1 hours of sunshine (25%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
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.
May 23 » The New York Public Library is dedicated.
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.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
When copying data from this family tree, please include a reference to the origin: Henk Trox, "Family tree Trox", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-trox/I5876.php : accessed January 25, 2026), "Grietje Harmina Gesina Thiessens (1911-1911)".
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