The temperature on June 18, 1911 was between 11.5 °C and 20.0 °C and averaged 15.8 °C. There was 7.8 mm of rain. There was 7.5 hours of sunshine (45%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
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 29 » Italy declares war on the Ottoman Empire.
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.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
When copying data from this family tree, please include a reference to the origin: Harry Westerman, "Family tree Westerman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-westerman/I3229.php : accessed February 14, 2026), "Jacob Striezenau (1911-1911)".
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