would prefer a charge of insincerity against their authors, or attempt to withhold any portion of that public patronage and consideration, to which their zeal and philanthropy so justly entitle them. The agents which are employed in cases of suspended animation, are far too indiscriminately recommended; some of them, without doubt, offer valuable resources to the physician, and only require a judicious application to ensure their success; while others are entirely useless and frivolous, and ought to be dismissed from our service, since the retaining them only embarrasses the practitioner, and that too at a period which of all others requires the utmost decision in the selection of a plan of treatment, and the greatest promptness in its execution. The following may be considered as the principal resources upon which the _Humane Society_ rely for restoration of persons apparently dead from sudden accidents, viz. 1. _Inflation of the lungs._ 2. _Application of heat._ 3. _Internal Exhibition of stimulants._ 4. _Friction._ 5. _Electricity._ 6. _Exposure of the surface of the body to cool air._ 7. _Blood-letting._ We shall offer a few observations upon the methods of applying these agents. _On the manner of producing artificial respiration._ We are indebted to _Mr. Brodie_ for the valuable directions that are to guide the execution of this important operation. (_Manuscript Notes._) A common pair of bellows will be found as manageable and efficient an apparatus for the inflation of the lungs, as any instrument that could be contrived; those manufactured for the service of the Humane Society are not of a size sufficient to inflate the lungs of even a large dog, much less those of man; nor is it necessary to employ double bellows on this occasion, for the air will escape from the lungs without being withdrawn by suction; besides which, it is stated that the forcible exhaustion of the lungs is liable to occasion pulmonic hemorrhage. It has been proposed to insert the tube of the bellows into the trachea, by means of a wound in that structure, but there are great objections to such a proceeding; the hemorrhage which is likely to occur,[68] may inundate the windpipe; besides which, the operation occasions delay, which, however trifling, will be important in cases where the action of the heart has become much enfeebled; and moreover the wound itself is an evil which ought to be avoided, if artificial respiration can be established without it; and were these objections even overruled, there still remains another; experience has shewn that the air thus introduced issues by the opening of the larynx, without having dilated the lungs.