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.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
Day of marriage May 16, 1925
The temperature on May 16, 1925 was between 12.6 °C and 27.2 °C and averaged 20.2 °C. There was 12.3 hours of sunshine (78%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
In The Netherlands , there was from August 4, 1925 to March 8, 1926 the cabinet Colijn I, with Dr. H. Colijn (ARP) as prime minister.
February 28 » The Charlevoix-Kamouraska earthquake strikes northeastern North America.
March 18 » The Tri-State Tornado hits the Midwestern states of Missouri, Illinois, and Indiana, killing 695 people.
April 30 » Automaker Dodge Brothers, Inc is sold to Dillon, Read & Co. for US$146million plus $50million for charity.
August 5 » Plaid Cymru is formed with the aim of disseminating knowledge of the Welsh language that is at the time in danger of dying out.
November 5 » Secret agent Sidney Reilly, the first "super-spy" of the 20th century, is executed by the OGPU, the secret police of the Soviet Union.
December 11 » Roman Catholic papal encyclical Quas primas introduces the Feast of Christ the King.
Day of death January 26, 1952
The temperature on January 26, 1952 was between -2.2 °C and 1.0 °C and averaged -0.2 °C. There was 1.7 mm of rain during 7.0 hours. The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 26 » Black Saturday in Egypt: rioters burn Cairo's central business district, targeting British and upper-class Egyptian businesses.
April 15 » First flight of the Boeing B-52 Stratofortress.
April 21 » Secretary's Day (now Administrative Professionals' Day) is first celebrated.
July 23 » General Muhammad Naguib leads the Free Officers Movement (formed by Gamal Abdel Nasser, the real power behind the coup) in overthrowing King Farouk of Egypt.
October 8 » The Harrow and Wealdstone rail crash kills 112 people.
December 30 » An RAF Avro Lancaster bomber crashed in Luqa, Malta after an engine failure, killing three crew members and a civilian on the ground.
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/I77025.php : accessed October 3, 2026), "Gerben van der Heide (1897-1952)".
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