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References
- ↑ Herschel, W.; Watson, Dr. (1781). "Account of a Comet, By Mr. Herschel, F.R.S.; Communicated by Dr. Watson, Jun. of Bath, F.R.S". Philosophical Transactions of the Royal Society . 71. London: 492–501. Bibcode:1781RSPT...71..492H. doi:10.1098/rstl.1781.0056. S2CID 186208953.
- ↑ "Verzeichniss aller bisher entdeckten Doppeltsterne" In Johann Elert Bode's Astronomisches Jahrbuch for 1784, pp. 183-6.
- ↑ Burke, James (1978). Connections . London: Macmillan. p. 196. ISBN 0-333-24827-9.
- ↑ "Coal Tar Before the Invention of Town's Gas" . Retrieved 2011-12-31.
- 1 2 Emsley, John (2001). Nature's Building Blocks: an A–Z guide to the elements. Oxford University Press. ISBN 978-0-19-850341-5.
- ↑ Hjelm, P. J. (1788). "Versuche mit Molybdäna, und Reduction der selben Erde". Der Königl. Schwedischen Akademie der Wissenschaften neue Abhandlungen aus der Naturlehre, Haushaltungskunst und Mechanik. 49. Leipzig: 268.
- ↑ "Copley Medal | British scientific award". Encyclopedia Britannica. Retrieved 21 July 2020.
- ↑ "Laennec, René-Théophile-Hyacinthe (1781-1826)". catalogue.bnf.fr (in French). Bibliothèque Nationale de France. Retrieved 6 February 2021.