January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
February 1 » La bohème premieres in Turin at the Teatro Regio (Turin), conducted by the young Arturo Toscanini.
March 1 » Henri Becquerel discovers radioactive decay.
July 28 » The city of Miami, Florida is incorporated.
August 16 » Skookum Jim Mason, George Carmack and Dawson Charlie discover gold in a tributary of the Klondike River in Canada, setting off the Klondike Gold Rush.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of death December 4, 1954
The temperature on December 4, 1954 was between 7.8 °C and 12.7 °C and averaged 9.7 °C. There was 0.5 mm of rain during 0.2 hours. The almost completely overcast was. The average windspeed was 6 Bft (strong wind) and was prevailing from the southwest. Source: KNMI
January 21 » The first nuclear-powered submarine, the USSNautilus, is launched in Groton, Connecticut by Mamie Eisenhower, the First Lady of the United States.
April 25 » The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories.
July 20 » Germany: Otto John, head of West Germany's secret service, defects to East Germany.
August 10 » At Massena, New York, the groundbreaking ceremony for the Saint Lawrence Seaway is held.
September 3 » The German submarineU-505 begins its move from a specially constructed dock to its site at Chicago's Museum of Science and Industry.
December 2 » The Sino-American Mutual Defense Treaty, between the United States and Taiwan, is signed in Washington, D.C.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I139586.php : accessed March 6, 2026), "Andrina den Ruijter (????-1954)".
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