[69] Yet I have known many in whom no Purge was necessary, and have seen some rendered more obstinate and chronical by erroneous Purging. But a Vomit is very generally necessary before the Bark is given. _K._ When the Fever is a Tertian, an Ounce should be given between the two Fits: which makes eight Doses, one of which is to be taken every three Hours. In a Quartan I direct one Ounce and a half, to be taken in the same Manner. It is meer trifling to attempt preventing the Returns with smaller Doses. The frequent Failures of the Bark are owing to over small Doses. On such Occasions the Medicine is cried down, and censured as useless, when the Disappointment is solely the Fault of those who do not employ it properly. The last Dose is to be given two Hours before the usual Return of the Fit. The Doses, just mentioned, frequently prevent the Return of the Fit; but whether it returns or not, after the Time of its usual Duration is past, repeat the same Quantity, in the same Number of Doses, and Intervals, which certainly keeps off another. For six Days following, half the same Quantity must be continued, in the Intervals that would have occurred between the Fits, if they had returned: and during all this Time the Patient should inure himself to as much Exercise, as he can well bear. Sec. 261. Should the Fits be very strong, the Pain of the Head violent, the Visage red, the Pulse full and hard; if there is any Cough; if, even after the Fit is over, the Pulse still is perceivably hard; if the Urine is inflamed, hot and high-coloured, and the Tongue very dry, the Patient must be bled, and drink plentifully of Barley Water No. 3. These two Remedies generally bring the Patient into the State described Sec. 259: in which State he may take on a Day, when the Fever is entirely off, three or four Doses of the Powder No. 24, and then leave the Fever to pursue its own Course for the Space of a few Fits. But should it not then terminate of itself, the Bark must be recurred to. If the Patient, even in the Interval of the Returns, has a foetid, furred Mouth, a Loathing, Pains in the Loins, or in the Knees, much Anxiety, and bad Nights, he should be purged with the Powder No. 21 or the Potion No. 23, before he takes the Bark. Sec. 262. If Fevers in Autumn appear to be of the continual kind, and very like putrid Fevers, the Patients should drink abundantly of Barley Water; and if at the Expiration of two or three Days, there still appears to be a Load or Oppression at the Stomach, the Powder No. 34 or that of 35 is to be given (but see Sec. 241): and if, after the Operation of this, the Signs of Putridity continue, the Body is to be opened with repeated Doses of the Powder No. 24; or, where the Patients are very robust, with No. 21; and when the Fever becomes quite regular, with distinct _Remissions_ at least, the Bark is to be given as directed Sec. 260.