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.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
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 marriage March 1, 1919
The temperature on March 1, 1919 was between 1.3 °C and 6.8 °C and averaged 3.5 °C. There was 4.2 hours of sunshine (39%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 16 » Nebraska becomes the 36th state to approve the Eighteenth Amendment to the United States Constitution. With the necessary three-quarters of the states approving the amendment, Prohibition is constitutionally mandated in the United States one year later.
January 18 » World War I: The Paris Peace Conference opens in Versailles, France.
February 11 » Friedrich Ebert (SPD), is elected President of Germany.
March 21 » The Hungarian Soviet Republic is established becoming the first Communist government to be formed in Europe after the October Revolution in Russia.
May 15 » The Winnipeg general strike begins. By 11:00, almost the whole working population of Winnipeg had walked off the job.
September 22 » The steel strike of 1919, led by the Amalgamated Association of Iron and Steel Workers, begins in Pennsylvania before spreading across the United States.
Day of death February 7, 1984
The temperature on February 7, 1984 was between 1.9 °C and 6.6 °C and averaged 4.9 °C. There was 0.6 mm of rain during 0.3 hours. There was 2.4 hours of sunshine (25%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. 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 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.
May 17 » Prince Charles calls a proposed addition to the National Gallery, London, a "monstrous carbuncle on the face of a much-loved and elegant friend", sparking controversies on the proper role of the Royal Family and the course of modern architecture.
July 1 » The PG-13 rating is introduced by the MPAA.
August 11 » "We begin bombing in five minutes": United States President Ronald Reagan, while running for re-election, jokes while preparing to make his weekly Saturday address on National Public Radio.
November 19 » San Juanico disaster: A series of explosions at the Pemex petroleum storage facility at San Juan Ixhuatepec in Mexico City starts a major fire and kills about 500 people.
December 19 » The Sino-British Joint Declaration, stating that China would resume the exercise of sovereignty over Hong Kong and the United Kingdom would restore Hong Kong to China with effect from July 1, 1997 is signed in Beijing, China by Deng Xiaoping and Margaret Thatcher.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I279088.php : accessed March 17, 2026), "Bertha Maria Rentiens (1897-1984)".
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