March 14 » The Gold Standard Act is ratified, placing the United States currency on the gold standard.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
May 17 » The children's novel The Wonderful Wizard of Oz, by L. Frank Baum, is first published in the United States. The first copy is given to the author's sister.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death May 15, 1968
The temperature on May 15, 1968 was between 6.9 °C and 15.6 °C and averaged 11.4 °C. There was 14.6 mm of rain during 3.6 hours. There was 1.0 hours of sunshine (6%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Roxanne C Andorfer, "Andorfer Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/andorfer-family-tree/P4069.php : accessed May 3, 2025), "Leo Thomas GIBBONS (1900-1968)".
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