The temperature on July 20, 1889 was about 23.2 °C. The air pressure was 4 kgf/m2 and came mainly from the south-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 53%. Source: KNMI
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
May 2 » Menelik II, Emperor of Ethiopia, signs the Treaty of Wuchale, giving Italy control over Eritrea.
July 11 » Tijuana, Mexico, is founded.
August 4 » The Great Fire of Spokane, Washington destroys some 32 blocks of the city, prompting a mass rebuilding project.
September 28 » The General Conference on Weights and Measures (CGPM) defines the length of a meter.
November 23 » The first jukebox goes into operation at the Palais Royale Saloon in San Francisco.
Day of death October 3, 1969
The temperature on October 3, 1969 was between 13.8 °C and 18.4 °C and averaged 15.3 °C. There was 0.8 mm of rain during 1.4 hours. There was 2.5 hours of sunshine (22%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
February 4 » Yasser Arafat takes over as chairman of the Palestine Liberation Organization.
April 7 » The Internet's symbolic birth date: Publication of RFC 1.
May 16 » Venera program: Venera 5, a Soviet space probe, lands on Venus.
May 20 » The Battle of Hamburger Hill in Vietnam ends.
July 3 » Space Race: The biggest explosion in the history of rocketry occurs when the Soviet N-1 rocket explodes and subsequently destroys its launchpad.
August 15 » The Woodstock Music & Art Fair opens in upstate New York, featuring some of the top rock musicians of the era.
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/I13684.php : accessed January 21, 2026), "Petrus Johannes Dreyer e2 (1889-1969)".
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