Heat has the effect of dilating the blood vessels and hastens repair in bruised, strained, or torn tissues. This is a variety of hyperemia treatment which is especially useful in the absence of bacteria. In infected areas the growth of bacteria, and increased pus formation, would be encouraged and heat is contraindicated. We are yet without an antiseptic material which can be used in sufficient strength to affect the growth of germs and yet not injure the patient. Injury of the part treated, and absorption into the circulation are both to be avoided. The application of dressings, wet with corrosive sublimate, or other chemical solutions to the unbroken skin over inflamed areas, is a fallacy. Any benefit which has been observed to follow their use, has undoubtedly been due to the effect of the moisture and warmth or cold, according to the temperature of the dressing, thus obtained, while local sloughing and general constitutional poisoning are a common result of such applications. A light gauze dressing, applied cold, and kept constantly wet with any evaporating solution, will greatly relieve the congestion and so assist the inflamed tissues in their contest with any irritating materials. A thick wet dressing made with a hot solution, and well protected against evaporation so that it will retain its heat, will produce the same effect as a poultice, although less powerful. When there are discharging wounds or raw surfaces, unprotected wet gauze should be employed, for poultices are then inadmissible, and the weak antiseptic solution will inactivate and wash away bacteria. Astringent solutions have an excellent effect upon inflammatory processes and the most generally useful of these is the 50 per cent. solution of acetate of aluminium. The following is a modified Burow’s solution: Alum 24 gms., or 6 drachms Lead acetate 38 ” ” 9-1/2 ” Water 1000 ” ” 2 pints Filter after mixture has been allowed to stand for 24 hours. Ointments are employed by many in the treatment of small areas of inflammation; they are useful, though not as efficient as hot or cold wet dressings. Over the unbroken skin, they can only act like a poultice and should not be employed where infection exists. On clean wounds they are unnecessary, but upon ulcers or wounds which show no tendency to heal, such ointments as Peruvian balsam, 5 per cent., or scarlet red, 4 per cent., are extremely valuable. +THE PROCESS OF REPAIR+ +Regeneration of Tissues.+ The reparative powers of the tissues of the human body are considerable, although not comparable with those of the lower animals, in the lowest orders of which the reproduction of an entire limb, or even one-half of the body, may take place. In order to understand the regeneration of tissue, we must first consider briefly the life history of the cells.