The temperature on July 17, 1953 was between 14.4 °C and 22.7 °C and averaged 17.8 °C. There was 4.0 mm of rain during 3.3 hours. There was 4.5 hours of sunshine (28%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
April 25 » Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA.
June 18 » A United States Air Force C-124 crashes and burns near Tachikawa, Japan, killing 129.
June 18 » The Egyptian revolution of 1952 ends with the overthrow of the Muhammad Ali dynasty and the declaration of the Republic of Egypt.
September 26 » Rationing of sugar in the United Kingdom ends
October 1 » A Mutual Defense Treaty Between the United States and the Republic of Korea is concluded in Washington, D.C.
October 30 » President Eisenhower approves the top-secret document NSC 162/2 concerning the maintenance of a strong nuclear deterrent force against the Soviet Union.
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/I19013.php : accessed January 23, 2026), "Petronella Dorothea Pretorius (1920-1953)".
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