April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 15 » The deadliest tsunami in Japan's history kills more than 22,000 people.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of death April 11, 1955
The temperature on April 11, 1955 was between 4.2 °C and 12.3 °C and averaged 8.7 °C. There was 0.1 mm of rain during 0.2 hours. There was 3.6 hours of sunshine (26%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
July 15 » Eighteen Nobel laureates sign the Mainau Declaration against nuclear weapons, later co-signed by thirty-four others.
September 6 » Istanbul's Greek, Jewish, and Armenian minorities are the target of a government-sponsored pogrom; dozens are killed in ensuing riots.
October 26 » After the last Allied troops have left the country, and following the provisions of the Austrian Independence Treaty, Austria declares that it will never join a military alliance.
November 1 » The Vietnam War begins.
November 1 » The bombing of United Airlines Flight 629 occurs near Longmont, Colorado, killing all 39 passengers and five crew members aboard the Douglas DC-6B airliner.
December 5 » E. D. Nixon and Rosa Parks lead the Montgomery Bus Boycott.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P4771.php : accessed January 6, 2026), "Clifton A. Sprague (1896-1955)".
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