According to the explanation of Palladius, rigors and tremors are occasioned by fumes or vapours arising in the internal parts, and being diffused over the body. (24.) The treatment recommended by Haly Abbas is simple and judicious. He directs us to give draughts of hot water, to put the patient’s feet into hot water, and to rub the feet, and, if necessary, the other parts of the body, with calefacient oils and the like. (Pract. iii, 20.) Avicenna gives a very accurate account of the different modes of treatment, but they are much the same as our author’s. He approves of ligatures to the extremities, of rubbing them with stimulant oils, or even with liniments prepared with assafœtida and mustard. He says the bath of hot oil is very beneficial. He also recommends draughts of hot water, and potions containing opium, which, he remarks, will procure sleep and perspiration. In certain cases he allows hot wine, which had been recommended by Hippocrates. (Aph. vii, 56.) He directs us to open the bowels with the hiera, or pills of assafœtida. (iv, i, 2.) Rhases particularly commends a draught of hot water. (Cont. xxx.) SECT. XLVII.—ON SWEATS. We must allow critical sweats to go on until they produce the necessary evacuation, and assist by means of moderate heat and rest, and by not wiping away the sweat (for one brings on another), by washing the mouth with warm liquids, by warm drinks, and by sleep. The sweats which occur in the decline of a fever are to be treated like the critical. Sudorific remedies are sufficiently treated of in the 48th section of the First Book. But when the sweats exceed in quantity, they must be wiped off, and the covering of clothes lightened, so as to cool the patient. For, by exceeding, they occasion lassitude, and often bring on syncope. Let, therefore, the covering be light and moistened; let the air be cooled; and let ventilation be used during sleep. Let the black myrtle, pounded, be sprinkled on the body, and gall, and the bark of the pine, in like manner. Let amber and polenta, with astringent wine, be applied to the proper parts; and let the face be sponged with oxycrate. Archigenes uses quicklime and the burned lees of wine in these cases, and for the rigor not succeeded by heat; for both, he says, when heated, become dry. He also orders us to bathe the middle parts of the body with the juice of plantain, or coriander, or purslain, or cabbage, that they may obstruct the passages of the sweat. In sleep, pieces of cloth smeared with Cimolian earth, dissolved in water, are to be applied to the back and chest; and the whole body should be anointed with the oil of roses, or of apples, or of lentisk, or of myrtle, or with the cerates from them. But fatty substances are particularly adapted to them; for, by shutting up the insensible pores, they prevent the passage of the fluid. It is clear that dry food and moderately astringent wines are befitting to