The temperature on December 21, 1904 was between -2.8 °C and 3.2 °C and averaged -0.4 °C. There was 5.7 hours of sunshine (74%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
February 28 » S.L. Benfica is founded in Portugal.
May 10 » The Horch & Cir. Motorwagenwerke AG is founded. It would eventually become the Audi company.
May 15 » Russo-Japanese War: The Russian minelayer Amur lays a minefield about 15 miles off Port Arthur and sinks Japan's battleships Hatsuse, 15,000 tons, with 496 crew and Yashima.
June 16 » Eugen Schauman assassinates Nikolay Bobrikov, Governor-General of Finland.
August 10 » Russo-Japanese War: The Battle of the Yellow Sea between the Russian and Japanese battleship fleets takes place.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
Day of death March 15, 1951
The temperature on March 15, 1951 was between 2.3 °C and 10.0 °C and averaged 6.8 °C. There was 0.1 mm of rain during 0.3 hours. There was 6.0 hours of sunshine (51%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
March 29 » Ethel and Julius Rosenberg are convicted of conspiracy to commit espionage.
April 5 » Cold War: Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union.
May 16 » The first regularly scheduled transatlantic flights begin between Idlewild Airport (now John F Kennedy International Airport) in New York City and Heathrow Airport in London, operated by El Al Israel Airlines.
May 21 » The opening of the Ninth Street Show, otherwise known as the 9th Street Art Exhibition: A gathering of a number of notable artists, and the stepping-out of the post war New York avant-garde, collectively known as the New York School.
October 15 » Mexican chemist Luis E. Miramontes completes the synthesis of norethisterone, the basis of an early oral contraceptive.
November 10 » With the rollout of the North American Numbering Plan, direct-dial coast-to-coast telephone service begins in the United States.
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/P19315.php : accessed January 26, 2026), "Winifred Rockefeller (1904-1951)".
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