The temperature on August 23, 1909 was between 7.1 °C and 19.5 °C and averaged 14.3 °C. There was 8.5 hours of sunshine (60%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
March 10 » By signing the Anglo-Siamese Treaty of 1909, Thailand relinquishes its sovereignty over the Malay states of Kedah, Kelantan, Perlis and Terengganu, which become British protectorates.
May 13 » The first Giro d'Italia starts from Milan. Italian cyclist Luigi Ganna will be the winner.
July 25 » Louis Blériot makes the first flight across the English Channel in a heavier-than-air machine from Calais to Dover, England, United Kingdom in 37 minutes.
August 19 » The first automobile race at the Indianapolis Motor Speedway.
August 30 » Burgess Shale fossils are discovered by Charles Doolittle Walcott.
September 20 » The South Africa Act 1909 creates the Union of South Africa from the British Colonies from four smaller colonies.
Day of death November 12, 1909
The temperature on November 12, 1909 was between 6.0 °C and 10.9 °C and averaged 9.5 °C. There was 3.8 mm of rain. The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. Source: KNMI
January 28 » United States troops leave Cuba with the exception of Guantanamo Bay Naval Base after being there since the Spanish–American War.
February 12 » The National Association for the Advancement of Colored People (NAACP) is founded.
February 15 » The Flores Theater fire in Acapulco, Mexico kills 250.
April 18 » Joan of Arc is beatified in Rome.
September 7 » Eugène Lefebvre crashes a new French-built Wright biplane during a test flight at Juvisy, south of Paris, becoming the first aviator in the world to lose his life in a powered heavier-than-air craft.
September 30 » The Cunard Line's RMS Mauretania makes a record-breaking westbound crossing of the Atlantic, that will not be bettered for 20 years.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I86558.php : accessed December 26, 2025), "Roelf Grimmius (1909-1909)".
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