February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
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.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
Day of death August 21, 1898
The temperature on August 21, 1898 was about 16.7 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 99%. Source: KNMI
January 13 » Émile Zola's J'accuse…! exposes the Dreyfus affair.
April 25 » Spanish–American War: The United States declares war on Spain.
June 11 » The Hundred Days' Reform, a planned movement to reform social, political, and educational institutions in China, is started by the Guangxu Emperor, but is suspended by Empress Dowager Cixi after 104 days. (The failed reform led to the abolition of the Imperial examination in 1905.)
June 12 » Philippine Declaration of Independence: General Emilio Aguinaldo declares the Philippines' independence from Spain.
June 27 » The first solo circumnavigation of the globe is completed by Joshua Slocum from Briar Island, Nova Scotia.
September 13 » Hannibal Goodwin patents celluloid photographic film.
When copying data from this family tree, please include a reference to the origin: Daniel Develter, "Family tree Daniel Develter", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-daniel-develter/I250.php : accessed May 11, 2025), "Hendrik Arthur DEVELTER (1897-1898)".
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