May 27 » The F4-strength St. Louis–East St. Louis tornado hits in St. Louis, Missouri, and East St. Louis, Illinois, killing at least 255 people and causing over $10-million in damage.
June 4 » Henry Ford completes the Ford Quadricycle, his first gasoline-powered automobile, and gives it a successful test run.
November 1 » A picture showing the bare breasts of a woman appears in National Geographic magazine for the first time.
Day of death March 15, 1960
The temperature on March 15, 1960 was between 3.5 °C and 13.6 °C and averaged 8.0 °C. There was 9.1 hours of sunshine (77%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
March 22 » Arthur Leonard Schawlow and Charles Hard Townes receive the first patent for a laser.
May 6 » More than 20million viewers watch the first televised royal wedding when Princess Margaret marries Anthony Armstrong-Jones at Westminster Abbey.
June 20 » The Mali Federation gains independence from France (it later splits into Mali and Senegal).
August 20 » Senegal breaks from the Mali Federation, declaring its independence.
September 10 » At the Summer Olympics in Rome, Abebe Bikila becomes the first sub-Saharan African to win a gold medal, winning the marathon in bare feet.
December 17 » Troops loyal to Emperor Haile Selassie in Ethiopia crush the coup that began December 13, returning power to their leader upon his return from Brazil. Haile Selassie absolves his son of any guilt.
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/I15625.php : accessed January 31, 2026), "Pieter Ignatius Michael du Plessies (1896-1960)".
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