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.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
December 6 » London becomes the world's first city to host licensed taxicabs.
Day of marriage May 1, 1929
The temperature on May 1, 1929 was between -0.8 °C and 11.1 °C and averaged 5.1 °C. There was 0.1 mm of rain. There was 9.3 hours of sunshine (63%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. 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 11 » Kingdom of Italy and the Vatican sign the Lateran Treaty.
February 26 » President Calvin Coolidge signs an executive order establishing the 96,000 acre Grand Teton National Park in Wyoming.
August 8 » The German airship Graf Zeppelin begins a round-the-world flight.
October 3 » The Kingdom of Serbs, Croats and Slovenes is renamed to Yugoslavia by King Alexander I.
December 24 » A four alarm fire breaks out in the West Wing of the White House in Washington, D.C.
December 24 » Assassination attempt on Argentine President Hipólito Yrigoyen.
Day of death April 16, 1952
The temperature on April 16, 1952 was between 7.3 °C and 20.3 °C and averaged 13.5 °C. There was 0.1 mm of rain. There was 10.7 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
March 21 » Alan Freed presents the Moondog Coronation Ball, the first rock and roll concert, in Cleveland, Ohio.
April 15 » First flight of the Boeing B-52 Stratofortress.
July 3 » The Constitution of Puerto Rico is approved by the United States Congress.
July 3 » The SSUnited States sets sail on her maiden voyage to Southampton. During the voyage, the ship takes the Blue Riband away from the RMSQueen Mary.
November 4 » The United States government establishes the National Security Agency, or NSA.
November 14 » The first regular UK Singles Chart published by the New Musical Express.
When copying data from this family tree, please include a reference to the origin: Agatha Jacoba Maria Lindeboom-Kleef, "Family tree Kleef, Reus, Lindeboom,Quax", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kleef/I6746.php : accessed February 26, 2026), "Alida Maria Dapper (1897-1952)".
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