January 16 » The United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
May 22 » The Associated Press is formed in New York City as a non-profit news cooperative.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
October 25 » The United Kingdom annexes the Transvaal.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death December 23, 1968
The temperature on December 23, 1968 was between 3.8 °C and 8.9 °C and averaged 6.4 °C. There was 1.5 mm of rain during 2.1 hours. There was -0.1 hours of sunshine (0%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 23 » USS Pueblo (AGER-2) is attacked and seized by naval forces of North Korea.
September 15 » The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.
September 30 » The Boeing 747 is rolled out and shown to the public for the first time.
November 8 » The Vienna Convention on Road Traffic is signed to facilitate international road traffic and to increase road safety by standardising the uniform traffic rules among the signatories.
November 20 » A total of 78 miners are killed in an explosion at the Consolidated Coal Company's No. 9 mine in Farmington, West Virginia in the Farmington Mine disaster.
December 31 » The first flight of the Tupolev Tu-144, the first civilian supersonic transport in the world.
When copying data from this family tree, please include a reference to the origin: Alle Elbers, "Sluzigers (e.a.)", database, Genealogy Online (https://www.genealogieonline.nl/sluzigers/I132928.php : accessed December 27, 2025), "Hendrik Kragt (± 1873-1968)".
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