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 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).
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
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.
Day of death February 23, 1983
The temperature on February 23, 1983 was between -4.7 °C and 5.3 °C and averaged 0.1 °C. There was 9.3 hours of sunshine (89%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
May 1 » The Sydney Entertainment Centre is opened.
June 18 » Space Shuttle program: STS-7, Astronaut Sally Ride becomes the first American woman in space.
July 19 » The first three-dimensional reconstruction of a human head in a CT is published.
September 23 » Saint Kitts and Nevis joins the United Nations.
September 27 » Richard Stallman announces the GNU Project to develop a free Unix-like operating system.
December 19 » The original FIFA World Cup trophy, the Jules Rimet Trophy, is stolen from the headquarters of the Brazilian Football Confederation in Rio de Janeiro, Brazil.
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/I133135.php : accessed October 19, 2026), "Henry Postma (1897-1983)".
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