I suspect, however, that the most frequent successes with arsenic will, after all, be made in the cases of more or less anæmic male patients who are attacked with the neurotic form of angina in the midst of a career (as is especially the case with some professional careers) that implies not merely incessant labor, but great anxiety of mind. The drug does little good, however, if not positive harm, in that form of angina pectoris minor which is not the result purely of these causes, but of these, or some of these, plus the morbid action of the alcoholic excess, to which the patient has fled in order to relieve mental harassment and the fatigue that comes from overwork, especially overwork at tasks that are not congenial to his natural disposition; there is usually in such cases a heightened irritability of the alimentary canal, which is almost sure to cause arsenic to disagree: the really useful treatment is quinine for the first few days, and then, when the stomach will bear it, cod-liver oil in increasing doses, up to a large daily amount given for a long time together. On the whole, arsenic, from its singularly happy combination of powers as a blood-tonic, a special stimulant of the nervous system, and withal as a special opposer of the periodic tendency, must be regarded as one of the most powerful weapons in the physician's hands, and (although it seems to act best in the neuralgias of the vagus and of the fifth) there is a possibility of its proving the most effective remedy in almost any given case which may come before us. 2. The narcotic-stimulant treatment for neuralgia includes some of the most powerful remedies for the disease which we possess. These remedies have very different properties, but they all agree in this, that in small doses they appear restorative of nerve-function--in large doses depressors of the same. Four very different types, at least, of narcotic-stimulant drugs are useful in neuralgia: (_a_) There is the opium type, by which pain is very directly antagonized, and, besides this, sleep is also directly favored. (_b_) There is the belladonna type, by which pain is also much relieved, though with far greater certainty in some regions than in others (_e. g._, much the most powerful effect is seen in cases of pelvic visceralgia), but sleep is by no means so certainly or directly produced as by opium. (_c_) There is the chloral type, which is almost purely hypnotic; it is represented almost solely by chloral itself, which is resembled by scarcely any other drug. (_d_) There is bromide of potassium, which stands alone for its powerful action on the cerebral vaso-motor nerves, and which is useful in neuralgia simply by its power to check psychical excitement directly (through the circulation) and indirectly (through the production of sleep).