The temperature on April 30, 1904 was between 9.5 °C and 13.3 °C and averaged 11.1 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 8 » The Blackstone Library is dedicated, marking the beginning of the Chicago Public Library system.
February 9 » Russo-Japanese War: Battle of Port Arthur concludes.
July 21 » Louis Rigolly, a Frenchman, becomes the first man to break the 100mph (161km/h) barrier on land. He drove a 15-liter Gobron-Brillié in Ostend, Belgium.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
December 3 » The Jovian moon Himalia is discovered by Charles Dillon Perrine at California's Lick Observatory.
December 6 » Theodore Roosevelt articulated his "Corollary" to the Monroe Doctrine, stating that the U.S. would intervene in the Western Hemisphere should Latin American governments prove incapable or unstable.
Day of death February 7, 1947
The temperature on February 7, 1947 was between -12.2 °C and -4.5 °C and averaged -8.5 °C. There was 7.3 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
April 16 » An explosion on board a freighter in port causes the city of Texas City, Texas, to catch fire, killing almost 600.
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.
April 30 » In Nevada, Boulder Dam is renamed Hoover Dam.
May 31 » Ferenc Nagy, the democratically elected Prime Minister of Hungary, resigns from office after blackmail from the Hungarian Communist Party accusing him of being part of a plot against the state. This grants the Communists effective control of the Hungarian government.
October 26 » Kashmir conflict: The Maharaja of Kashmir and Jammu signs the Instrument of Accession with India.
October 30 » The General Agreement on Tariffs and Trade (GATT), the foundation of the World Trade Organization (WTO), is founded.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I4965.php : accessed December 24, 2025), "Helena Maria de Bock (1904-1947)".
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