The temperature on July 21, 1868 was about 28.3 °C. The air pressure was 5 kgf/m2 and came mainly from the northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 52%. Source: KNMI
From June 1, 1866 till June 4, 1868 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Heemskerk with the prime ministers Mr. J.P.J.A. graaf Van Zuijlen van Nijevelt (AR) and Mr. J. Heemskerk Azn. (conservatief).
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
March 5 » Mefistofele, an opera by Arrigo Boito, receives its premiere performance at La Scala.
May 26 » The Impeachment of Andrew Johnson ends with his acquittal by one vote.
May 29 » Mihailo Obrenović III, Prince of Serbia is assassinated.
May 30 » Decoration Day (the predecessor of the modern "Memorial Day") is observed in the United States for the first time after a proclamation by John A. Logan, head of the Grand Army of the Republic (a veterans group).
June 23 » Christopher Latham Sholes received a patent for an invention he called the "Type-Writer".
August 18 » French astronomer Pierre Janssen discovers helium.
Day of marriage May 11, 1895
The temperature on May 11, 1895 was about 15.6 °C. The airpressure was 77 cm mercury. The atmospheric humidity was 66%. Source: KNMI
January 12 » The National Trust is founded in the United Kingdom.
June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
June 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
September 3 » John Brallier becomes the first openly professional American football player, when he was paid US$10 by David Berry, to play for the Latrobe Athletic Association in a 12-0 win over the Jeanette Athletic Association.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
Day of death July 31, 1947
The temperature on July 31, 1947 was between 12.8 °C and 22.6 °C and averaged 17.8 °C. There was 12.3 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
February 23 » International Organization for Standardization is founded.
April 28 » Thor Heyerdahl and five crew mates set out from Peru on the Kon-Tiki to demonstrate that Peruvian natives could have settled Polynesia.
June 23 » The United States Senate follows the United States House of Representatives in overriding U.S. President Harry S. Truman's veto of the Taft–Hartley Act.
September 30 » The 1947 World Series is the first to be televised, to include an African-American player, to exceed $2 million in receipts, to see a pinch-hit home run, and to have six umpires on the field.
November 6 » Meet the Press, the longest running television program in history, makes its debut.
December 16 » William Shockley, John Bardeen and Walter Brattain build the first practical point-contact transistor.
When copying data from this family tree, please include a reference to the origin: Albert van Ommen, "Family tree Van Ommen", database, Genealogy Online (https://www.genealogieonline.nl/van-ommen-stamboom/I697.php : accessed February 17, 2026), "Aart van Ommen (1868-1947)".
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