April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
April 20 » Pierre and Marie Curie refine radium chloride.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death July 21, 1957
The temperature on July 21, 1957 was between 9.5 °C and 19.9 °C and averaged 15.2 °C. There was 5.9 hours of sunshine (37%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
January 11 » The African Convention is founded in Dakar, Senegal.
March 25 » United States Customs seizes copies of Allen Ginsberg's poem "Howl" on obscenity grounds.
August 1 » The United States and Canada form the North American Aerospace Defense Command (NORAD).
September 24 » President Eisenhower sends the 101st Airborne Division to Little Rock, Arkansas, to enforce desegregation.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
November 17 » Vickers Viscount G-AOHP of British European Airways crashes at Ballerup after the failure of three engines on approach to Copenhagen Airport. The cause is a malfunction of the anti-icing system on the aircraft. There are no fatalities.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I6890.php : accessed February 3, 2026), "Debora Susanna Krynauw (1865-1957)".
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