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BUT in Feavers, where onely the Heat causeth the Blood to boyl, and so to become scalding hot, when the Feaver is ta∣ken away, that is, when the bitter and sharp Humours are cast out of the Body by some Evacuation, or that the Fire is quenched out with some cooling Julips, the Blood will be the same again,
without any alteration, as Water is; onely in the boyling, the Blood may wast and evaporate forth of the Body through the Pores, as Water doth forth of the Vessel it is boyling in: But if the Blood be corrupted, or mix'd with Humours, as Water is often with Mud, there is no way but letting it forth, drawing it out of the Veins, that the Heart and the Liver, as the Springs, * 1.1 may send in more, which may be Fresh and Clear, into the Veins again, unless those Springs be corrupted, and then there is no Remedy, for then Death will alter the Course of Life in that Body.
Unnatural heat and cold may be cured in the Vital Parts, but not when they are corrupted.