April 24 » Joshua Slocum, the first person to sail single-handedly around the world, sets sail from Boston, Massachusetts aboard the sloop "Spray".
May 25 » The Republic of Formosa is formed, with Tang Jingsong as its president.
June 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
Day of death May 19, 1957
The temperature on May 19, 1957 was between 8.2 °C and 15.8 °C and averaged 11.9 °C. There was 1.6 mm of rain during 1.0 hours. There was 2.7 hours of sunshine (17%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 5 » In a speech given to the United States Congress, United States President Dwight D. Eisenhower announces the establishment of what will later be called the Eisenhower Doctrine.
January 23 » American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
March 4 » The S&P 500 stock market index is introduced, replacing the S&P 90.
June 27 » Hurricane Audrey makes landfall near the Texas–Louisiana border, killing over 400 people, mainly in and around Cameron, Louisiana.
August 21 » The Soviet Union successfully conducts a long-range test flight of the R-7 Semyorka, the first intercontinental ballistic missile.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
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/I70689.php : accessed March 17, 2026), "Johannes van Polanen (1895-1957)".
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