I have tried every possible remedy for black vomit, and there is not one, which has constantly given the same result. I have had extraordinary success with agents, which at other times produced no effect; and I affirm, that there is no therapeutic agent, which can always be employed with entire confidence. Black vomit is the symptom of alteration, more or less profound, of the bile and of the blood. If it is alteration of the bile, presenting solely the black color of jet, hope remains; but when the vomited matter is of the color and consistency of coffee grounds, the patient is irretrievably lost. This truth rests on an experience of forty years. It is not surprising then, that under a great number of circumstances, the most heroic agents are absolutely ineffective. _Iron._—It is not necessary to give iron in too large doses. The two best ferruginous preparations are iron reduced by hydrogen, and the muriatic tincture of perchloride of iron. Small doses, often repeated, are much more easily absorbed than large doses. A quarter of a grain of powder of iron every hour, or a drop of perchloride of iron in three ounces of water, taken by the spoonful, every hour, is all that the stomach can bear; more is rejected by the stool or by vomiting. The reconstructive action of this remedy will be assisted by cold lemonades, and by ice in small quantities. Cold vinegar lotions over the whole body, frictions, enveloping the patient in sheets wet with cool vinegared water, compresses of cold vinegared water on the abdomen, changed as soon as they become warm, are adjuncts, which should not be neglected, and which will always be found good. _Ice._—Ice is one of the agents greatly abused, especially in the first and second period. It is an excellent tonic; but I am not well assured of its employment in the third period. _Drinks._—During the first period, the diet drinks ought to be warm or hot, to facilitate the diaphoresis so necessary at this time. But in the second and third period, there is used only cool water, slightly acidulated, and sweetened _ad gratam saporem_. In the great majority of cases the patient prefers simple water. _Regimen._—Absolute diet is demanded, rigorously, while the fever lasts. But when the febrile symptoms have disappeared entirely, and at the same time local congestions dissipated, a little thin broth may be allowed. A certain sensation of hunger is felt, especially towards the end of the first period; but the desire of the patient must be resisted, although the pulse maybe less frequent and less full. Often at the first touch, the pulse seems regular, but the attentive physician will find something abnormal, and he will soon be assured, that the improvement is more apparent than real.