39. In the course of the dissection of wounds, a careful search must be made for foreign bodies in them. When firearms have occasioned them, the examination should not be ended before discovering the bullet, wadding, or other article, if any, lodged in the body; and whatever is found must be preserved. When the article discharged from firearms, or when any other weapon had passed through and through a part of the body, the two wounds must be carefully distinguished by their respective characters, especially as regards their comparative size, inversion or eversion, smoothness or laceration, of their edges, their roundness or angularity, and the comparative amount of bleeding from each. In gunshot injuries, the presence or absence of marks of gunpowder should be noted. 40. When wounds are situated over any of the great cavities, they ought not to be particularly examined until the cavity is laid open; and in laying open the cavity, the external incisions should be kept clear of the wounds. 41. When the discoloured state of a portion of the skin is such as to render it doubtful whether it is due to injury or to changes after death, an incision should be made to ascertain whether there is blood effused into the textures, constituting true ecchymosis, or merely gorging of the vessels of the skin, or discoloration from infiltration of the colouring matter of the blood, which takes place in depending parts of a dead body. The term suggillation should be avoided, as it has been used in opposite senses by Continental and British authors. The respective expressions, “discoloration from extravasated blood,” and “lividity after death,” are preferable. VI. Examination in Cases of Poisoning 42. In examining a body in a case of suspected poisoning, the inspectors should begin with the alimentary canal, first tying two ligatures round the gullet, above the cardiac orifice of the stomach, two round its pyloric end, and a third at the sigmoid flexure of the colon, then removing the stomach and entire intestines; next dissecting out the parts in the mouth, throat, neck, and chest in one mass; and, finally, dissecting the gullet, with the parts about the throat, from the other organs of the chest. The several portions of the alimentary canal may then be examined in succession. 43. Previous to commencing the dissection in cases of supposed poisoning, the inspectors should make such inquiries as may enable them to form an opinion as to the class of poison to which the death may be traceable, and thus to guide them as to the conclusions to be come to from the presence, or it may be the complete absence, of any marked appearance explaining the cause of death.