January 16 » The United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.
January 23 » Second Boer War: The Battle of Spion Kop between the forces of the South African Republic and the Orange Free State and British forces ends in a British defeat.
February 9 » The Davis Cup competition is established.
March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
May 17 » The children's novel The Wonderful Wizard of Oz, by L. Frank Baum, is first published in the United States. The first copy is given to the author's sister.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
When copying data from this family tree, please include a reference to the origin: Arie van Engeldorp Gastelaars, "Family tree Van Engel(s)dorp Gastelaars", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-engeldorp-gastelaars/I1167119957.php : accessed May 23, 2024), "Lambertus Johannes Ladenberg (1900-1900)".
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