February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of death April 25, 1961
The temperature on April 25, 1961 was between 3.3 °C and 17.6 °C and averaged 11.7 °C. There was 0.1 mm of rain during 1.0 hours. There was 9.3 hours of sunshine (64%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
January 3 » The SL-1 nuclear reactor is destroyed by a steam explosion in the only reactor incident in the United States to cause immediate fatalities.
January 11 » Throgs Neck Bridge over the East River, linking New York City's boroughs of The Bronx and Queens, opens to road traffic.
May 16 » Park Chung-hee leads a coup d'état to overthrow the Second Republic of South Korea.
July 12 » Indian city Pune floods due to failure of the Khadakwasla and Panshet dams, killing at least two thousand people.
September 1 » The first conference of the Non-Aligned Countries is held in Belgrade, Yugoslavia.
September 12 » The African and Malagasy Union is founded.
When copying data from this family tree, please include a reference to the origin: E. Lemoine, "Stamboom Lemoine/Post/Breg/Kensen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-post/I0851.php : accessed January 2, 2026), "Petrus "Piet" Bos (1897-1961)".
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