“Nous adoptons la division suivante, en six classes, de tous les poisons connus, et de toutes les manières possibles par lesquelles les substances vénéneuses peuvent nuire au corps humain: POISONS SEPTIQUES—Poisons STUPEFIANS, ou NARCOTIQUES—Poisons NARCOTICO-ACRES—Poisons ACRES, ou RUBEFIANS—Poisons CORROSIFS, ou ESCAROTIQUES—Poisons ASTRINGENS.” Footnote 211: _Belloc_ surmises that where acrid poisons have been administered, narcotics may have been taken to relieve pain; and thus that a sort of combination of the symptoms of both classes may be produced. Footnote 212: PHARMACOLOGIA. Edit. 5th, vol. i, page 225, c. _Antidotes_. Footnote 213: Journal de Physiologie Experimentale, (1er numero Janvier 1821.) Footnote 214: The adoption of this term led to a very extraordinary error in medicine—the application of Arsenic in the form of vapour, together with the fumes of frankincense, myrrh, and other gums, in a paroxysm of Asthma! This frightful practice arose from confounding the gum Juniper, or Vernix of the Arabians, which by their medical writers was prescribed in fumigations, under the name of Sandarach, for the Σανδαρακη of the Greeks. Footnote 215: _Orfila._ Toxicolog. General. Footnote 216: Pharmacologia, edit. v, vol. 2, art. _Arsenici Oxydum_. Footnote 217: A very large quantity is annually prepared from the sublimate which collects in the chimneys and flues of the smelting works and burning houses in Cornwall. We have examined samples prepared according to the improved process of Dr. _Edwards_, and found them to be perfectly free from foreign admixture: a fact of much greater importance than the reader may at first imagine. Those who require farther information upon this subject may consult a paper in the first volume of the _Transactions of the Royal Geological Society of Cornwall_, by J. H. VIVIAN, Esq. entitled “_Observations on the processes for making the different preparations of Arsenic, which are practised in Saxony_.” Footnote 218: _Bergman_ ii, 286. We are, however, upon the authority of _Mr. Richard Phillips_, inclined to consider this statement of its specific gravity incorrect. He found that when transparent it did not exceed 3·715, and, when opaque, 3·260. Footnote 219: Vol. ii, p. 86. Footnote 220: The chemist may satisfy himself of this fact by heating some arsenious acid on a piece of platina foil, and then alternately raising and depressing it into the blue flame of the spirit, when corresponding changes in odour will take place in the fumes. Footnote 221: See page 184, Note. Footnote 222: See _Mr. Marshall’s_ Remarks, &c. Footnote 223: See the case reported by _Dr. Yelloly_, in the 5th volume of the Edinburgh Med. and Surg. Journal. Footnote 224: Epist. 168. Footnote 225: De Pest. Hist. 99. Annot. Footnote 226: De Peste Lond. p. 239. Footnote 227: