January 5 » Dreyfus affair: French army officer Alfred Dreyfus is stripped of his rank and sentenced to life imprisonment on Devil's Island.
January 12 » The National Trust is founded in the United Kingdom.
April 24 » Joshua Slocum, the first person to sail single-handedly around the world, sets sail from Boston, Massachusetts aboard the sloop "Spray".
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
August 31 » German Count Ferdinand von Zeppelin patents his navigable balloon.
Day of death April 21, 1970
The temperature on April 21, 1970 was between 4.2 °C and 10.4 °C and averaged 8.2 °C. There was 5.1 mm of rain during 10.2 hours. The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 15 » Muammar Gaddafi is proclaimed premier of Libya.
May 15 » Philip Lafayette Gibbs and James Earl Green are killed at Jackson State University by police during student protests.
August 17 » Venera program: Venera 7 launched. It will later become the first spacecraft to successfully transmit data from the surface of another planet (Venus).
October 5 » The British Trade Commissioner is kidnapped by members of the FLQ, triggering the October Crisis in Canada.
October 10 » Fiji becomes independent.
November 18 » U.S. President Richard Nixon asks the U.S. Congress for $155 million in supplemental aid for the Cambodian government.
When copying data from this family tree, please include a reference to the origin: Otto Toon, "Family tree Otto", database, Genealogy Online (https://www.genealogieonline.nl/otto-stamboom/I4791.php : accessed March 3, 2026), "Johanna Paulina Otto (1895-1970)".
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