[485]. Journ. Universel, xviii. 265.
[486]. See Poisonous Gases.
[487]. Journal de Chimie Médicale, 1842, p. 656.
[488]. It appears that arsenic does not always undergo this change. Berzelius once kept some fragments in an open phial for three years without observing any change in appearance or weight. [Annales de Chimie et de Physique, xi. 240.] Buchner once made a similar observation, and is inclined to think that oxidation does not occur, if the metal is quite pure. [Repertorium für die Pharmacie, xxi. 29.]
[489]. American Journ. of Med. Science, x. 122.
[490]. Hahnemann, Uber die Arsenic-vergiftung, 13.
[491]. Edin. Medico-Chirurgical Transactions, ii. 292.
[492]. Journal de Chimie Médicale, ii. 61.
[493]. As far back at least as the time of Zacchias. See his Quæstiones Medico-legales, iii. 37, 11.
[494]. Edin. Med. and Surg. Journal, 1827, xxviii. 96.