January 30 » The first Anglo-Japanese Alliance is signed in London.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
April 20 » Pierre and Marie Curie refine radium chloride.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death December 3, 1968
The temperature on December 3, 1968 was between 0.2 °C and 1.8 °C and averaged 1.2 °C. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
March 2 » Baggeridge Colliery closes marking the end of over 300 years of coal mining in the Black Country.
March 17 » As a result of nerve gas testing by the U.S. Army Chemical Corps in Skull Valley, Utah, over 6,000 sheep are found dead.
April 6 » Pierre Elliott Trudeau wins the Liberal Leadership Election, and becomes Prime Minister of Canada soon after.
April 11 » Assassination attempt on Rudi Dutschke, leader of the German student movement.
July 1 » The Treaty on the Non-Proliferation of Nuclear Weapons is signed in Washington, D.C., London and Moscow by sixty-two countries.
December 9 » Douglas Engelbart gave what became known as "The Mother of All Demos", publicly debuting the computer mouse, hypertext, and the bit-mapped graphical user interface using the oN-Line System (NLS).
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P15121.php : accessed January 17, 2026), "Lee Heman Strong (1902-1968)".
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