January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
March 1 » Battle of Adwa: An Ethiopian army defeats an outnumbered Italian force, ending the First Italo-Ethiopian War.
March 2 » The Battle of Adwa: The Italian Army defeated by the Ethiopian Army in Adwa, Tigray, Ethiopia.
May 26 » Nicholas II becomes the last Tsar of Imperial Russia.
November 1 » A picture showing the bare breasts of a woman appears in National Geographic magazine for the first time.
December 30 » Canadian ice hockey player Ernie McLea scores the first hat-trick in Stanley Cup play, and the Cup-winning goal as the Montreal Victorias defeat the Winnipeg Victorias 6–5.
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
January 7 » Contralto Marian Anderson becomes the first person of color to perform at the Metropolitan Opera in Giuseppe Verdi's Un ballo in maschera.
May 14 » Cold War: Eight Communist bloc countries, including the Soviet Union, sign a mutual defense treaty called the Warsaw Pact.
June 11 » Eighty-three spectators are killed and at least 100 are injured after an Austin-Healey and a Mercedes-Benz collide at the 24 Hours of Le Mans, the deadliest ever accident in motorsports.
July 9 » The Russell–Einstein Manifesto calls for a reduction of the risk of nuclear warfare.
July 15 » Eighteen Nobel laureates sign the Mainau Declaration against nuclear weapons, later co-signed by thirty-four others.
December 20 » Cardiff is proclaimed the capital city of Wales, United Kingdom.
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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