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.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
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.
December 30 » The British Colony of Natal annexes Zululand.
Day of death August 20, 1984
The temperature on August 20, 1984 was between 13.1 °C and 28.8 °C and averaged 20.9 °C. There was 11.5 hours of sunshine (80%). The average windspeed was 1 Bft (weak wind) and was prevailing from the east-northeast. 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.
January 22 » The Apple Macintosh, the first consumer computer to popularize the computer mouse and the graphical user interface, is introduced during a Super Bowl XVIII television commercial.
January 28 » Tropical Storm Domoina makes landfall in southern Mozambique, eventually causing 214 deaths and some of the most severe flooding so far recorded in the region.
February 29 » Pierre Trudeau announces his retirement as Liberal Party leader and Prime Minister of Canada.
May 8 » The Thames Barrier is officially opened, preventing the floodplain of most of Greater London from being flooded except under extreme circumstances.
August 15 » The Kurdistan Workers' Party in Turkey starts a campaign of armed attacks upon the Turkish military with an attack on police and gendarmerie bases in Şemdinli and Eruh
November 27 » Under the Brussels Agreement signed between the governments of the United Kingdom and Spain, the former agreed to enter into discussions with Spain over Gibraltar, including sovereignty.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I13763.php : accessed September 25, 2026), "Marguerite Julie Amirotto (Armirotto) (1897-1984)".
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