April 20 » Pierre and Marie Curie refine radium chloride.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death November 30, 1928
The temperature on November 30, 1928 was between 2.8 °C and 9.8 °C and averaged 7.2 °C. There was 9.6 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Harry Westerman, "Family tree Westerman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-westerman/X5171.php : accessed February 19, 2026), "Harry Sikko "Harm" Wieringa (1902-1928)".
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