German chemist Lothar Meyer makes a formal presentation of the revised and expanded version of his independently-created 1864 periodic table, „Die Natur der chemischen Elemente als Funktion ihrer Atomgewichte".
Publication of Adolphe Wurtz's Dictionnaire de chimie pure et appliquée begins in Paris.
June 24 – Sea Birds Preservation Act passed in the United Kingdom, preventing killing of designated species during the breeding season, the first Act to offer any protection to British wild birds.[1]
Frenchmissionary and naturalist Père Armand David receives the skin of a giant panda from a hunter, the first time this species has become known to a Westerner;[4] he also first describes a specimen of the "pocket handkerchief tree", which will be named in his honor as Davidia involucrata.
^Barclay-Smith, Phyllis (1959). "The British contribution to bird protection". Ibis. 101 (1): 115–122. doi:10.1111/j.1474-919X.1959.tb02363.x. Archived from the original on 2013-01-05. Retrieved 2021-02-16.
^Van Deusen, E. H. (April 1869). "Observations on a form of nervous prostration (neurasthenia) culminating in insanity". American Journal of Insanity. 25 (4): 445–461. doi:10.1176/ajp.25.4.445.
^Beard, George (1869). "Neurasthenia, or nervous exhaustion". The Boston Medical and Surgical Journal. 80 (13): 217–221. doi:10.1056/NEJM186904290801301.
^Grattan-Guinness, Ivor (2000). The Search for Mathematical Roots, 1870–1940. Princeton University Press. ISBN 978-0-691-05857-3.
^Woods, Daniel (2008). "Heliograph and Mirrors". In Sterling, Christopher (ed.). Military Communications: From Ancient Times to the 21st Century. ABC-CLIO. p. 208. ISBN 978-1851097326.
^Mance, Henry (1872-02-10). "The Heliograph or Sun Telegraph". United Service Institution of India. 1 (5): 123–130. hdl:2027/mdp.39015035103855. Retrieved 2013-06-16.
^Goode, Samuel (1875-06-14). "Mance's Heliograph, or Sun-Telegraph". Journal of the Royal United Service Institution. XIX (LXXXIII): 534–548. doi:10.1080/03071847509415772. Retrieved 2011-06-21.
^"Copley Medal | British scientific award". Encyclopedia Britannica. Retrieved 23 July 2020.
^Sicherman, Barbara (1980). Notable American Women: The Modern Period: a Biographical Dictionary. Cambridge: Belknap Press. p. 303. ISBN 978-0-67462-733-8.