Of no disease has Galen treated so frequently and fully as of fever. (See de Diff. Febrium, Meth. Med. viii and ix; Therap. ad Glauc., de Crisibus ii, 13, et alibi.) He everywhere inculcates that ephemeral fevers are affections of the _spirits_, by which he seems to have understood the heat and gases contained in the blood. The exciting or remote causes of them, according to him, are want of sleep, indigestion, sorrow, fear, anger, anxiety, the application of heat and cold, excessive fatigue, tumour of the groin, and the like. He remarks, that the heat in these fevers is not offensive on the first application of the fingers, but conveys an acrid sensation after a short time. He has particularly stated constriction as a proximate cause of fever; and this, by the way, is agreeable to what is stated by Cælius Aurelianus: “quidam vero conclusioni viarum causam febrium ascribentes.” (Acut. Morb. ii, 33.) In this variety, he approves of venesection, unless the patient be a child or a very old man. In the other cases, his most approved remedy is the bath; but his treatment is judiciously varied, according to circumstances. For example, when the fever arises from the depressing passions, he forbids hard friction and frequent baths, and merely directs us to pour tepid oil over the patient’s body. When it is produced by exposure to heat, he forbids us to use much oil, or to have recourse to hard friction, and directs us to pour upon the head water which has been cooled by means of ice, and to put the patient into a cold bath. Alexander, however, finds fault with him for giving heating medicines, such as pepper, and using hot applications over the stomach in such cases. Alexander’s account of the nature and treatment of these fevers cannot be perused with too much attention. He mentions as characteristics of ephemerals, that the urine is properly concocted from the first; and that the pulses have a quick and elevated diastole, with a shorter systole; the vessels, he adds, requiring refrigeration, rather than purification. They arise, he says, from many and various causes, such as repletion, want, watchfulness, fatigue, disorder of the belly, apostemes; and, in a word, from all the procatarctic causes. When the fever is occasioned by excessive fatigue, the indication, he states, is to supply moisture to the body, rather than to take from it. Hence, all friction with discutient oils ought to be avoided; and what is used for rubbing the body should be mixed with much water. But the principal dependence is to be put upon the tepid bath. Here, again, he thinks that Galen erred, in not directing that the oil used for rubbing the body should be diluted with water. He adds, that it will often have an excellent effect after the patient has come out of the tepid bath, and been anointed as directed, to make him take a warm bath and remain in it for a considerable time. When ephemerals arise from indigestion, he