December 26 – Marie and Pierre Curie announce discovery of a substance they call radium. It is the only moment where 5 elements are discovered the same year.
Ladislaus Bortkiewicz publishes a book about the Poisson distribution, The Law of Small Numbers,[8] first noting that events with low frequency in a large population follow a Poisson distribution even when the probabilities of the events vary.
Peter Borovsky, a Russian military surgeon working in Tashkent, publishes the first accurate description of the causative parasite for "Sart sore" (later known as leishmaniasis).[11]
^Humphrey, A. J.; O'Hagan, D. (2001). "Tropane alkaloid biosynthesis: a century old problem unresolved". Natural Product Reports. 18 (5): 494–502. doi:10.1039/b001713m. PMID 11699882. S2CID 228936.
^Yelverton, David E. (2004). "The Belgian Antarctic Expedition 1897–1899". Quest for a Phantom Strait: the Saga of the Pioneer Antarctic Peninsula Expeditions 1897–1905. Burpham: Polar Publishing. ISBN 0-9548003-0-3.
^von Bortkiewicz, Ladislaus (1898). Das Gesetz der kleinen Zahlen. Leipzig, Germany: B.G. Teubner. On page 1, Bortkiewicz presents the Poisson distribution. On pages 23-25, Bortkiewicz presents his famous analysis of "4. Beispiel: Die durch Schlag eines Pferdes im preussischen Heere Getöteten." (4. Example: Those killed in the Prussian army by a horse's kick.). On pages 17–20 Bortkiewicz presents his analysis of "1. Beispiel: Die Selbstmorde von Kindern in Preussen." (1. Example: Suicides of children in Prussia.). Bortkiewicz's book is reviewed in: L. v. Bortkewitsch (1898) "Das Gesetz der kleinen Zahlen," Monatshefte für Mathematik, vol. 9, pages 39-41.
^Blair, John S.G. (2001). In Arduis Fidelis: Centenary History of the Royal Army Medical Corps (2nd ed.). [Burntisland]: iynx Publishing. ISBN 0-9540583-2-1.
^Flechsig, P. (1898). "Neue Untersuchungen über die Markbildung in den menschlichen Grosshirnlappen". Neurologisches Centralblatt. 17: 977–996.
^Hoare, C. A. (1938). "Early discoveries regarding the parasite of oriental sore". Transactions of the Royal Society of Tropical Medicine and Hygiene. 32 (1): 67–92. doi:10.1016/S0035-9203(38)90097-5.
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