can furnish for the preservation of human beings that are in danger of perishing from accidental causes. The principal circumstances to be remembered are comprised in the following precepts. 1. The lungs are to be sufficiently, but not too much inflated. 2. The inspiration must be made of sufficient frequency. 3. The air is to be allowed a free exit from the lungs, so that the same air shall not be transmitted more than once. 4. The method of inflating the lungs must be simple, and easy of adoption; for as the interval of time, during which the artificial respiration can possibly be of any service, is very limited, it is important to avoid whatever may occasion the least delay. _Application of Heat._ There is perhaps no medium through which we can more successfully apply heat to the human body than that of the bath, because we can manage its application with precision; we know the exact degree of heat, and can avoid applying it in extremes; we, at the same time, can communicate it more rapidly, and more equally, than by any other means, and we are enabled to increase or diminish the temperature, by the addition of fresh portions of water, as circumstances may render it expedient. _Internal Exhibition of Stimulants._ The introduction of fluids into the stomach is not an easy process in many cases of suspended animation, as _trismus_ is by no means an uncommon occurrence; where, however, the spasm of the jaw has subsided, the practitioner with a little address may by means of a flexible tube easily accomplish his object. Glysters will likewise furnish an easy mode of applying stimulants. _Electricity._