The temperature on April 5, 1911 was between -5.5 °C and 1.7 °C and averaged -2.2 °C. There was 7.7 hours of sunshine (58%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
January 29 » Mexican Revolution: Mexicali is captured by the Mexican Liberal Party, igniting the Magonista rebellion of 1911.
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
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.
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: Ellen Stempher-Hellwig, "Family tree Hellwig", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hellwig/R1150.php : accessed September 30, 2026), "Bertha Elisabeth Petronella Maria (Bertha, Elisabeth Petronella Maria) Hermans (1911-)".
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