Medicines are liable to: For we know that experienced Physicians, call some Medicines cold Cordials, as Sorrel, which hath an Acid taste; and it is possible sometimes those Hu∣mours whch make the Blood sluggish may not be of a cold, but a hot Nature, in which cases hot Remedies may rather increase than diminish their ill effects; as if the white of an Egg be reduced to Water by beating, Spi∣rit of Wine will instead of diminishing in∣crease its Viscidity. And I once prepared a Vegetable Substance, which upon an additi∣on of Wine became much more Viscous than before.
But to proceed, a Specifick Medicine may alter the mass of Blood, by contributing to its Tenacity, without respect to its Fermen∣tation; for if the Blood be too thick, it can∣not readily pass through the small Capillary Vessels, by which Circulation is in a great means retarded; as on the other Hand, if it be too thin, it gets out of the Capillary Vessels, and first Stagnates, and then Putrifies; but these ill consequences may be prevented, by such Medicines as either on the one Hand divide the Parts of the Blood, and make them more minute, or on the other such as associate them, and stick them together.
Another way by which a Specifick Medi∣cine may rectifie the state of the Blood, is, by working so upon the Heart, as to make it transmit Blood more advantageously; and that either by corroborating its fibres, or dissolving some ill distempered matter, that