The temperature on April 29, 1911 was between 5.7 °C and 12.0 °C and averaged 8.9 °C. There was 4.3 mm of rain. There was 6.2 hours of sunshine (42%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
When copying data from this family tree, please include a reference to the origin: Ruud Zonneveld, "Family tree Zonneveld en Sonnevelt", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zonneveld-en-sonnevelt/I21106.php : accessed June 22, 2024), "Maria Johanna Markesteijn (1911-)".
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