The temperature on July 1, 1915 was between 10.6 °C and 21.8 °C and averaged 15.4 °C. There was 2.8 mm of rain. There was 3.7 hours of sunshine (22%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
May 7 » World War I: German submarine U-20 sinks RMS Lusitania, killing 1,198 people, including 128 Americans. Public reaction to the sinking turns many former pro-Germans in the United States against the German Empire.
June 29 » The North Saskatchewan River flood of 1915 is the worst flood in Edmonton history.
July 1 » Leutnant Kurt Wintgens of the then-named German Deutsches Heer's Fliegertruppe army air service achieves the first known aerial victory with a synchronized machine-gun armed fighter plane, the Fokker M.5K/MG Eindecker.
August 27 » Attempted assassination of Bishop Patrick Heffron, bishop of the Diocese of Winona by Rev. Louis M. Lesches.
September 30 » World War I: Radoje Ljutovac becomes the first soldier in history to shoot down an enemy aircraft with ground-to-air fire.
November 25 » Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences.
When copying data from this family tree, please include a reference to the origin: R.W.R. Koopmans, "Family tree Koopmans-Smits", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koopmans-smits/I1792.php : accessed June 15, 2024), "Anna "Antje" Kalt (1864-1915)".
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