The temperature on May 18, 1910 was between 12.9 °C and 19.3 °C and averaged 15.7 °C. There was 5.1 mm of rain. There was 3.2 hours of sunshine (20%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
January 13 » The first public radio broadcast takes place; a live performance of the operas Cavalleria rusticana and Pagliacci are sent out over the airwaves from the Metropolitan Opera House in New York.
June 2 » Charles Rolls, a co-founder of Rolls-Royce Limited, becomes the first man to make a non-stop double crossing of the English Channel by plane.
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
October 15 » Airship America is launched from New Jersey in the first attempt to cross the Atlantic by a powered aircraft.
November 7 » The first air freight shipment (from Dayton, Ohio, to Columbus, Ohio) is undertaken by the Wright brothers and department store owner Max Moorehouse.
November 10 » The date of Thomas A. Davis' opening of the San Diego Army and Navy Academy, although the official founding date is November 23, 1910.
When copying data from this family tree, please include a reference to the origin: Rob van Koert, "Family tree Van Koert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-koert/I52265.php : accessed February 27, 2026), "Maria Elisabeth Heijkoop (1910-)".
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