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.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage June 21, 1916
The temperature on June 21, 1916 was between 5.7 °C and 16.2 °C and averaged 11.9 °C. There was 0.8 hours of sunshine (5%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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 24 » Easter Rising: Irish rebels, led by Patrick Pearse and James Connolly, launch an uprising in Dublin against British rule and proclaim an Irish Republic.
May 16 » The United Kingdom of Great Britain and Ireland and the French Third Republic sign the secret wartime Sykes-Picot Agreement partitioning former Ottoman territories such as Iraq and Syria.
July 22 » Preparedness Day Bombing: In San Francisco, a bomb explodes on Market Street during a parade, killing ten and injuring 40.
September 7 » US federal employees win the right to Workers' compensation by Federal Employers Liability Act (39 Stat. 742; 5 U.S.C. 751)
September 17 » World War I: Manfred von Richthofen ("The Red Baron"), a flying ace of the German Luftstreitkräfte, wins his first aerial combat near Cambrai, France.
November 5 » The Everett massacre takes place in Everett, Washington as political differences lead to a shoot-out between the Industrial Workers of the World organizers and local police.
Day of death April 30, 1957
The temperature on April 30, 1957 was between 6.6 °C and 11.4 °C and averaged 8.8 °C. There was 9.6 hours of sunshine (65%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 23 » American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
March 4 » The S&P 500 stock market index is introduced, replacing the S&P 90.
April 10 » The Suez Canal is reopened for all shipping after being closed for three months.
July 11 » Prince Karim Husseini Aga Khan IV inherits the office of Imamat as the 49th Imam of Shia Imami Ismai'li worldwide, after the death of Sir Sultan Mahommed Shah Aga Khan III.
July 26 » Carlos Castillo Armas, dictator of Guatemala, is assassinated.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
When copying data from this family tree, please include a reference to the origin: Erik Tijmes en Lea Sappé, "Genealogy Tijmes en Sappe", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-tijmes-en-sappe/I9293.php : accessed June 14, 2024), "Petronella Jacoba Koster (1897-1957)".
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