_Emetics._—Emesis is one of the most important remedies in the first, but becomes injurious in the second period. Black vomit often comes soon after the administration of an ill-judged emetic. The principle indication are these—the tongue humid, saburral, charged with whitish mucous deposits, nausea, disposition to vomit, bad taste in the mouth, the temperament bilious, constitution lymphatic, atmosphere damp, etc. Administered under these circumstances in the first period of the invasion, the emetic is a heroic remedy. I prescribe thirty grains of ipecac, dissolved in six ounces of distilled water, taken in one draught. Nausea soon occurs, and as soon as the patient begins to vomit, the effect of the medicine is assisted by drinks of warm water. The food contents of the stomach are first ejected, then bile. The drinks of warm water should be continued, until the liquid ejected is as clear as the water that is swallowed. After the vomiting, the patient takes one or two cups of tilia. Ordinarily, the congestive symptoms of the brain increase, by reason of these efforts, but after a short repose and a little sleep, the skin becomes covered with sweat, and on awaking, the pain in the head is sensibly diminished. I prefer ipecac to tartar emetic, because the action of the former is more gentle and more constant, and because tartar emetic irritates the mucous membrane of the stomach. After ipecac, the patient remains calm, whilst after tartar emetic, the nausea continues, and is very often followed by diarrhœa. I insist strongly on patiently awaiting the effect of the ipecac before giving warm water, because prematurely swallowed, this embarrasses instead of promoting the effect of the medicine. Let us, however, observe, that ipecac, if useful when clearly indicated, may produce deplorable consequences, if administered despite counter-indications. In my experience, it is counter-indicated, whenever the period of invasion is passed, and even during the period of invasion, when the patient has not been attacked immediately after a meal, when the disease has not commenced with chills, when the individual is plethoric and is subject to cerebral congestions, or when he complains of pains in the stomach, even when fasting. The first twenty-four hours of the invasion passed, the emetic can have fatal effects. At this period, indeed, the stomach and abdominal organs suffer in a manner more direct, and the efforts of vomiting increasing, these local congestions may determine a condition as much more difficult to encounter, as the period of the disease is advanced. How often have I seen black vomit appear after an emetic improperly given! I have seen under the same circumstances epistaxis which could not be arrested, and such irritability of the stomach, that it could not bear anything. _Purgatives._—Purgatives are of as great importance as emetics in the treatment of yellow fever.