The outside pressure, therefore, is immense upon the physician, tending to force him to active treatment of some kind. Certain old superstitions, still lingering in the mind of the public, and not yet utterly expelled from that of the profession, are at the bottom of this, or contribute to it largely. One of the most ancient is, that disease is a malignant agency, or entity, to be driven out of the body by offensive substances, as the smoke of the fish's heart and liver drove the devil out of Tobit's bridal chamber, according to the Apochrypha. Epileptics used to suck the blood from the wounds of dying gladiators. [Plinii Hist. Mundi. lib. xxviii. c. 4.] The Hon. Robert Boyle's little book was published some twenty or thirty years before our late President, Dr. Holyoke, was born. [A Collection of Choice and Safe Remedies. The Fifth Edition, corrected. London, 1712. Dr. Holyoke was born in 1728.] In it he recommends, as internal medicines, most of the substances commonly used as fertilizers of the soil. His “Album Graecum” is best left untranslated, and his “Zebethum Occidentale” is still more transcendentally unmentionable except in a strange dialect. It sounds odiously to us to hear him recommend for dysentery a powder made from “the sole of an old shoe worn by some man that walks much.” Perhaps nobody here ever heard of tying a stocking, which had been worn during the day, round the neck at night for a sore throat. The same idea of virtue in unlovely secretions! [The idea is very ancient. “Sordes hominis” “Sudore et oleo medicinam facientibus.”--Plin. xxviii. 4.] Even now the Homoeopathists have been introducing the venom of serpents, under the learned title of Lachesis, and outraging human nature with infusions of the pediculus capitis; that is, of course, as we understand their dilutions, the names of these things; for if a fine-tooth-comb insect were drowned in Lake Superior, we cannot agree with them in thinking that every drop of its waters would be impregnated with all the pedicular virtues they so highly value. They know what they are doing. They are appealing to the detestable old superstitious presumption in favor of whatever is nauseous and noxious as being good for the sick. Again, we all occasionally meet persons stained with nitrate of silver, given for epilepsy. Read what Dr. Martin says, about the way in which it came to be used, in his excellent address before the Norfolk County Medical Society, and the evidence I can show, but have not time for now, and then say what you think of the practice which on such presumptions turns a white man as blue as the double-tattooed King of the Cannibal Islands! [Note A.]