The temperature on August 3, 1911 was between 13.6 °C and 23.8 °C and averaged 19.0 °C. There was 3.5 hours of sunshine (23%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of death August 17, 1911
The temperature on August 17, 1911 was between 9.8 °C and 21.0 °C and averaged 15.3 °C. There was 4.6 hours of sunshine (31%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
May 23 » The New York Public Library is dedicated.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
October 5 » The Kowloon–Canton Railway commences service.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I120244.php : accessed March 16, 2026), "Josephus Christianus Petrus de Roos (1911-1911)".
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