The temperature on July 11, 1911 was between 9.8 °C and 22.5 °C and averaged 16.6 °C. There was 15.0 hours of sunshine (91%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
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.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
When copying data from this family tree, please include a reference to the origin: Keith Mann Spencer, "Mann Spencer Tree", database, Genealogy Online (https://www.genealogieonline.nl/mann-spencer-tree/P133.php : accessed January 16, 2026), "Hazel Cook (± 1897-????)".
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