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 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
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 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
Day of marriage May 11, 1917
The temperature on May 11, 1917 was between 6.6 °C and 25.7 °C and averaged 17.1 °C. There was 12.2 hours of sunshine (79%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
April 16 » Vladimir Lenin returns to Petrograd, Russia, from exile in Switzerland.
July 20 » World War I: The Corfu Declaration, which leads to the creation of the post-war Kingdom of Yugoslavia, is signed by the Yugoslav Committee and Kingdom of Serbia.
September 14 » The Russian Empire is formally replaced by the Russian Republic.
November 5 » October Revolution: Lenin calls for the October Revolution.
November 28 » The Estonian Provincial Assembly declares itself the sovereign power of Estonia.
December 6 » Finland declares independence from Soviet Russia.
Day of death March 7, 1974
The temperature on March 7, 1974 was between -0.5 °C and 4.2 °C and averaged 1.9 °C. There was 0.1 mm of rain. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
February 4 » M62 coach bombing: The Provisional Irish Republican Army (IRA) explodes a bomb on a bus carrying off-duty British Armed Forces personnel in Yorkshire, England. Nine soldiers and three civilians are killed.
March 8 » Charles de Gaulle Airport opens in Paris, France.
June 26 » The Universal Product Code is scanned for the first time to sell a package of Wrigley's chewing gum at the Marsh Supermarket in Troy, Ohio.
September 10 » Guinea-Bissau gains independence from Portugal.
November 13 » Ronald DeFeo, Jr. murders his entire family in Amityville, Long Island in the house that would become known as The Amityville Horror.
December 1 » TWA Flight 514, a Boeing 727, crashes northwest of Dulles International Airport, killing all 92 people on board.
When copying data from this family tree, please include a reference to the origin: M. Jacobs, "Ancestors Birgit Willaert", database, Genealogy Online (https://www.genealogieonline.nl/kwartierstaat-birgit-willaert/I4454.php : accessed August 8, 2025), "Hendrik Oortwijn (1897-1974)".
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