January 31 » Czechoslav Trade Union Association is founded in Prague.
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.
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 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of death April 30, 1981
The temperature on April 30, 1981 was between 7.6 °C and 10.3 °C and averaged 9.5 °C. There was 7.5 mm of rain during 16.4 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
June 27 » The Central Committee of the Communist Party of China issues its "Resolution on Certain Questions in the History of Our Party Since the Founding of the People's Republic of China", laying the blame for the Cultural Revolution on Mao Zedong.
August 5 » President Ronald Reagan fires 11,359 striking air-traffic controllers who ignored his order for them to return to work.
September 18 » The Assemblée Nationale votes to abolish capital punishment in France.
October 20 » Two police officers and an armored car guard are killed during an armed robbery carried out by members of the Black Liberation Army and Weather Underground.
October 21 » Andreas Papandreou becomes Prime Minister of Greece, ending an almost 50-year-long system of power dominated by conservative forces.
December 15 » A suicide car bombing targeting the Iraqi embassy in Beirut, Lebanon, levels the embassy and kills 61 people, including Iraq's ambassador to Lebanon. The attack is considered the first modern suicide bombing.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I12649.php : accessed February 3, 2026), "Cornelia Helena Linde Theunissen (1897-1981)".
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