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 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
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 30 » The British Colony of Natal annexes Zululand.
Day of marriage February 28, 1929
The temperature on February 28, 1929 was between -12.9 °C and 2.6 °C and averaged -5.6 °C. There was 0.1 mm of rain. There was 4.6 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from March 8, 1926 to August 10, 1929 the cabinet De Geer I, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 14 » Saint Valentine's Day Massacre: Seven people, six of them gangster rivals of Al Capone's gang, are murdered in Chicago.
June 1 » The 1st Conference of the Communist Parties of Latin America is held in Buenos Aires.
June 7 » The Lateran Treaty is ratified, bringing Vatican City into existence.
October 7 » Photius II becomes Ecumenical Patriarch of Constantinople.
November 3 » The Gwangju Student Independence Movement occurred.
December 24 » A four alarm fire breaks out in the West Wing of the White House in Washington, D.C.
Day of death April 30, 1959
The temperature on April 30, 1959 was between 8.6 °C and 12.0 °C and averaged 10.5 °C. There was 1.8 mm of rain during 4.9 hours. The almost completely overcast was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 3 » Alaska is admitted as the 49th U.S. state.
September 14 » The Soviet probe Luna 2 crashes onto the Moon, becoming the first man-made object to reach it.
September 26 » Typhoon Vera, the strongest typhoon to hit Japan in recorded history, makes landfall, killing 4,580 people and leaving nearly 1.6 million others homeless.
October 21 » President Eisenhower approves the transfer of all US Army space-related activities to NASA, including most of the Army Ballistic Missile Agency.
November 2 » Quiz show scandals: Twenty-One game show contestant Charles Van Doren admits to a Congressional committee that he had been given questions and answers in advance.
November 20 » The Declaration of the Rights of the Child is adopted by the United Nations.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I109091.php : accessed October 25, 2026), "Johanna de Vries (1897-1959)".
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