The temperature on March 19, 1887 was about 3.3 °C. The air pressure was 2 kgf/m2 and came mainly from the north-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 46%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
February 23 » The French Riviera is hit by a large earthquake, killing around 2,000.
April 4 » Argonia, Kansas elects Susanna M. Salter as the first female mayor in the United States.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
September 5 » A fire at the Theatre Royal, Exeter, kills 186.
November 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of marriage May 3, 1913
The temperature on May 3, 1913 was between 6.1 °C and 15.9 °C and averaged 10.2 °C. There was 0.5 mm of rain. There was 6.0 hours of sunshine (40%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
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.
February 13 » The 13th Dalai Lama proclaims Tibetan independence following a period of domination by Manchu Qing dynasty and initiated a period of almost four decades of independence.
March 31 » The Vienna Concert Society rioted during a performance of modernist music by Arnold Schoenberg, Alban Berg, Alexander von Zemlinsky, and Anton von Webern, causing a premature end to the concert due to violence; this concert became known as the Skandalkonzert.
May 30 » The Treaty of London is signed, ending the First Balkan War; Albania becomes an independent nation.
June 23 » Second Balkan War: The Greeks defeat the Bulgarians in the Battle of Doiran.
July 31 » The Balkan States sign an armistice in Bucharest.
August 13 » First production in the UK of stainless steel by Harry Brearley.
Day of death October 19, 1926
The temperature on October 19, 1926 was between 0.3 °C and 11.7 °C and averaged 4.7 °C. There was 3.8 mm of rain. There was 3.9 hours of sunshine (37%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
April 6 » Varney Airlines makes its first commercial flight (Varney is the root company of United Airlines).
May 9 » Admiral Richard E. Byrd and Floyd Bennett claim to have flown over the North Pole (later discovery of Byrd's diary appears to cast some doubt on the claim.)
May 12 » The Italian-built airship Norge becomes the first vessel to fly over the North Pole.
June 14 » Brazil leaves the League of Nations.
June 23 » The College Board administers the first SAT exam.
November 15 » The NBC radio network opens with 24 stations.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I89381.php : accessed February 1, 2026), "Jan Potze (1887-1926)".
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