Peter Simon Pallas begins publication of Zoographia rosso-Asiatica, sistens omnium animalium in extenso Imperio rossico, et adjacentibus maribus observatorum recensionem, domicilia, mores et descriptiones, anatomen atque icones plurimorum in Saint Petersburg.
Joseph Louis Gay-Lussac and Louis Jacques Thénard publish Recherches Physico-Chimiques, faites sur la pile; sur la préparation chimique et les propriétés du potassium et du sodium; sur la décomposition de l'acide boracique; sur les acides fluorique, muriatique et muriatique oxigéné; sur l'action chimique de la lumière; sur l'analyse végétale et animale, etc. in Paris.
Amedeo Avogadro proposes Avogadro's law, that equal volumes of gases under constant temperature and pressure contain equal number of molecules.[2]
Francis Place publishes Illustrations and Proofs of the Principles of Population, including an examination of the proposed remedies of Mr. Malthus, and a reply to the objections of Mr. Godwin and others in London, the first significant text in English to advocate contraception.[5]
^Swain, Patricia A. (2005). "Bernard Courtois (1777–1838), famed for discovering iodine (1811), and his life in Paris from 1798" (PDF). Bulletin for the History of Chemistry. 30: 103–11. Archived from the original (PDF) on July 14, 2010. Retrieved 2011-05-24.
^"Michael Faraday". Famous Physicists and Astronomers. Retrieved 2007-03-12.
^Crilly, Tony (2007). 50 Mathematical Ideas you really need to know. London: Quercus. p. 33. ISBN 978-1-84724-008-8.
^Bell, C; Shaw, A (1868). "Reprint of the "Idea of a New Anatomy of the Brain," with Letters, &c". J Anat Physiol. 3 (Pt 1): 147–82. PMC1318665. PMID 17230788.
^"Francis Place". Spartacus Educational. Archived from the original on 2007-08-06. Retrieved 2011-10-12.