April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
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 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of death September 21, 1948
The temperature on September 21, 1948 was between 5.0 °C and 14.7 °C and averaged 9.3 °C. There was 5.3 mm of rain during 3.2 hours. There was 6.4 hours of sunshine (52%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from July 3, 1946 to August 7, 1948 the cabinet Beel I, with Dr. L.J.M. Beel (KVP) as prime minister.
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 25 » The first successful tornado forecast predicts that a tornado will strike Tinker Air Force Base, Oklahoma.
April 3 » Cold War: U.S. President Harry S. Truman signs the Marshall Plan, authorizing $5billion in aid for 16 countries.
April 28 » Igor Stravinsky conducted the premiere of his American ballet, Orpheus at the New York City Center.
June 22 » King George VI formally gives up the title "Emperor of India", half a year after Britain actually gave up its rule of India.
September 12 » Marshal Lin Biao, commander-in-chief of the Chinese communist Northeast Field Army, launched a massive offensive toward Jinzhou, Liaoshen Campaign has begun.
December 10 » The Human Rights Convention is signed by the United Nations.
When copying data from this family tree, please include a reference to the origin: Han Eman, "Family tree Eman/Swart-Radstok/Attevelt", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eman/I3768.php : accessed January 23, 2026), "Maria Helsdingen (1897-1948)".
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