January 13 » Émile Zola's J'accuse…! exposes the Dreyfus affair.
April 21 » Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date.
July 4 » En route from New York to Le Havre, the SS La Bourgogne collides with another ship and sinks off the coast of Sable Island, with the loss of 549 lives.
August 11 » Spanish–American War: American troops enter the city of Mayagüez, Puerto Rico.
September 13 » Hannibal Goodwin patents celluloid photographic film.
December 10 » Spanish–American War: The Treaty of Paris is signed, officially ending the conflict.
Day of death August 15, 1899
The temperature on August 15, 1899 was about 20.9 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 72%. Source: KNMI
January 23 » The Malolos Constitution is inaugurated, establishing the First Philippine Republic. Emilio Aguinaldo is sworn in as its first President.
February 16 » Iceland's first football club, Knattspyrnufélag Reykjavíkur, is founded.
February 22 » Filipino forces led by General Antonio Luna launch counterattacks for the first time against the American forces during the Philippine–American War. The Filipinos fail to regain Manila from the Americans.
July 17 » NEC Corporation is organized as the first Japanese joint venture with foreign capital.
September 13 » Henry Bliss is the first person in the United States to be killed in an automobile accident.
November 29 » FC Barcelona is founded by Catalan, Spanish and Englishmen. It later develops into one of Spanish football's most iconic and strongest teams.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I90347.php : accessed December 26, 2025), "Grietje Alberdina Slopsema (1898-1899)".
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