found an alkaloid in tea and called it theine. Jobst and Mulder in 1838 proved that these alkaloids are identical. It is now recognised that the alkaloids of cocoa, of guarana, and of Paraguay tea are all the same substance, or closely related.
Pelletier and Caventou isolated strychnine from the St. Ignatius beans in 1818, and brucine from false angostura bark (Brucæa anti-dysenterica) in 1819; in the same years they obtained veratrine from cevadilla seeds and white hellebore root; but it would appear that in their investigation of cevadilla seeds, which was the first to yield the alkaloid, they were preceded by a very short time by Meissner. Pelletier and Magendie produced emetine from ipecacuanha in 1817, and Pelletier alone is credited with narceine in 1832. Codeine was discovered by Robiquet in 1821 when he was examining a new process for obtaining morphine which had been suggested by Dr. William Gregory, of Edinburgh. Belladonna had been studied by Vauquelin and many chemists after him, but it was not until 1833 that atropine in a state of purity was isolated from it. This was accomplished simultaneously by Geiger and Hess, two German chemists, and by Mein, a German pharmacist.
ANÆSTHETICS.
The greatest triumph achieved in any department of medicine, and worthy, perhaps, to be described as almost, if not quite, the most beneficent discovery in the world's history, is that of the successful employment of anæsthetics. This great glory belongs to the nine-
