_Nitric Acid._—In this case the stomach will be found to contain a viscous, sanguinolent yellow or greenish fluid, which must be got rid of before injecting. The lungs will also be found highly congested, and the blood must therefore be emptied out. The acid, Nitrate of Mercury, and Muriatic Acid, produce about the same changes after death as those of Nitric Acid. _Oxalic Acid._—The stomach will be found to contain a dark, brown, mucous fluid, but in some cases of death from this poison there are no well marked lesions. _Oxalate of Potash_ produces the same changes. _Potash-Soda._—These alkalies and their carbonates are rarely used as poisons. Cicatrices and strictures of the œsophagus and stomach may be produced. _Ammonia._—The vapor of strong ammonia may cause death from inflammation of the larynx and air passages. But the strong solution of Ammonia produces corrosion of the mouth, œsophagus and stomach. _Nitrate of Potash._—In some cases, there is intense congestion of the stomach, and sometimes perforation of that organ. _Phosphorus._—The post mortem appearances vary with the length of time which lapses before death. If death takes place in a few hours, the only lesions are those produced by the direct action of the poison. The contents of the stomach, which must be evacuated, are often mixed with blood, and may have the peculiar smell of phosphorus. It is said that the mucous membrane of the stomach may emit a phosphorescent light in the dark. If death does not ensue until after several days, the lesions are more marked; the body is usually jaundiced, and there may be found a congestion of the liver, or there may be a small hemorrhage in the liver tissue. _Arsenic._—The stomach may be empty, or contain mucous mixed with blood, and the intestines contain a white, rice-water fluid, which must be emptied out. _Corrosive Sublimate._—The stomach is usually contracted; there are inflamed and congested, sometimes _gangrenous_, _patches_ of the mucous coat. The intestines may appear normal, or there may be patches of congestion. In both preceding cases it must be borne in mind that the poison may be absorbed by the skin, therefore the operator should use great care in manipulating the stomach and bowels. _Vegetable Irritants._—Aloes, colocynth, jalap, gamboge, scammony, savin, croton oil, colchicum, veratria, turpentine; all these drugs produce congestion and inflammation of the stomach and bowels. _Sulphate of Copper—Verdigris._—The post mortem appearances have only been observed in a moderate number of cases; the stomach may be unchanged, or there may be patches of gangrene and inflammation, and even perforation. _Tartar Emetic._—In this instance the lesions are not constant, but the lungs may be engorged with blood.