_Take fever powder_ (L), _thirty grains; calomel_ (N), _one grain; elixir of vitriol_ (G), _sixty, or seventy drops; essential oil of peppermint_ (U), _four drops upon a little lump of sugar; to which add water, half a tea cup full._ This draught will not only promote perspiration, but help to dissolve the siziness in the blood; and may therefore be repeated every six hours, for a few days. But the patient should always be kept moderately warm upon it, that it may work by perspiration.—This simple method I have known put the patient to rights again, after a severe onset. But sometimes this wretched disorder will require more powerful medicines to keep it in subjection. When the fibres are debilitated, and the blood still retains its viscid corruptive quality, the ague is apt to hang on the patient a long time, the succeeding fever apt to melt the patient down to a mere skeleton, and even destroy him. In this it is requisite to brace up the solids, and to infuse an astringency into the blood. To this intent, the Peruvian bark is now frequently prescribed, and if judiciously administered it is an excellent medicine; but as it is liable however, to be improperly given, and then productive of irreparable mischief, I have purposely omitted it in this catalogue; nevertheless, I shall give in its stead a medicine, superior both in virtue, and by far more safe in the application; not only in this kind of complaint, but in scorbutic cases, as I shall hereafter take notice of. The medicine is this, No. XXVIII _Elixir of Iron._ _Take a quantity of rusty iron, the smaller the pieces are, the better, for the less quantity will do_; pour on it good strong vinegar, sufficient to cover it; _let them steep till the vinegar becomes of a deep brown colour, which it soon will, and at length acquire a consistence of a black elixir. The vessel should be either stone or glass; but what is yet better is an iron pot, which of itself will contribute to the medicine._ If the patient therefore, after the vomit, and the above draught, is attacked again with the fit of the ague, and succeeding fever, have immediate recourse to your elixir of iron.——Let him take after the fever is off, every three hours, a table spoonful of the elixir, and should it seem to come up again at first (which it sometimes will, particularly if the stomach is yet foul) give immediately another spoonful, and repeat this at least three times of the day. A little gentle exercise upon taking the elixir is highly beneficial; and if it throws a gentle warmth over the body, and brings it into a gentle perspiration, you are sure of success.