Our next great authority on this subject is Celsus. In his account of the plague, we have to regret, however, that, although he dwells rather minutely on the prophylaxis and treatment, he has omitted to give us a description of the disease; and it is not easy to perceive the principles upon which some of his directions as to the prophylaxis and treatment are given. He recommends a journey to a distant place, or a sea voyage; when this cannot be accomplished, gestation and gentle exercise in the open air, but he forbids all excess. He also forbids early rising, exercise with naked feet after a meal or the bath, also emetics, laxatives, and sudorifics. He directs people to drink, by turns, first water and then wine. (i, 10.) With regard to the treatment, he disapproves, in general, of abstinence and purgative medicines, recommends bleeding, if the strength permit, more especially if the fever be attended with pain; but, if venesection cannot be practised, he directs emetics to be given. At an earlier period than in ordinary fevers the patient is to be put into the bath, and is afterwards to get hot undiluted wine, and everything of a glutinous nature, and flesh of this description. In the case of young persons, he directs these remedies to be administered with great caution. (iii, 7.) The historian Appian, Lucian, Pliny, and Plutarch, mention wine as an antidote to the plague. Livy and other ancient writers say that the plague is sometimes occasioned by excessive cold. (Histor. v.)