The temperature on July 25, 1909 was between 8.5 °C and 21.6 °C and averaged 15.8 °C. There was 2.2 mm of rain. There was 6.8 hours of sunshine (43%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
February 12 » The National Association for the Advancement of Colored People (NAACP) is founded.
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
August 24 » Workers start pouring concrete for the Panama Canal.
August 28 » A group of mid-level Greek Army officers launches the Goudi coup, seeking wide-ranging reforms.
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.
Day of marriage June 28, 1937
The temperature on June 28, 1937 was between 8.9 °C and 23.4 °C and averaged 17.1 °C. There was 11.9 hours of sunshine (71%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
February 11 » The Flint sit-down strike ends when General Motors recognizes the United Auto Workers trade union.
March 2 » The Steel Workers Organizing Committee signs a collective bargaining agreement with U.S. Steel, leading to unionization of the United States steel industry.
April 26 » Spanish Civil War: Guernica, Spain, is bombed by German Luftwaffe.
July 6 » Spanish Civil War: Battle of Brunete: The battle begins with Spanish Republican troops going on the offensive against the Nationalists to relieve pressure on Madrid.
July 26 » Spanish Civil War: End of the Battle of Brunete with the Nationalist victory.
September 21 » J. R. R. Tolkien's The Hobbit is published.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I25311.php : accessed February 27, 2026), "Johannes Georg Sluiter (1909-)".
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