CHAP. VI. Of Humors.
TO know the nature of Humors, is a thing not only necessary for Physitians,* 1.1 but also for Chi∣rurgeons, because there is no disease with matter which ariseth not from some one, or the mixture of more Humors. Which thing Hippocrates understanding, writ, every Creature to be either sick or well according to the condition of the Humors in the body.* 1.2 And certainly all putrid fea∣vers proceed from the putrefaction of Humors. Neither do any acknowledg any other original or distinction of the differences of Abscesses or Tumors: neither do ulcerated, broken, or other∣wise wounded members hope for the restauration of continuity, from other than from the sweet falling down of Humors to the wounded part. Which is the cause that often in the cure of these affects, the Physitians are necessarily busied in tempering the blood, that is, bringing to a medio∣crity the four Humors composing the mass of blood, if they at any time offend in quantity, or qua∣lity. For whether if any thing abound or digress from the wonted temper in any excess of heat, cold, viscosity, grosness, thinness, or any such like quality, none of the accustomed functions will be well performed.* 1.3 For which cause those chief helps to preserve and restore health have been di∣vinely invented; Phlebotomie, or blood-letting, which amends the quantity of too much bloud; and Purging, which corrects and draws away the vicious quality. But now let us begin to speak of the Humors, taking our beginning from the Definition.
An Humor is called (by Physitians) what thing soeuer is liquid and flowing in the body of li∣ving Creatures endued with Blood: and that is either natural, or against nature.* 1.4 The natural is so called because it is fit to defend, preserve, and sustain the life of a Creature.* 1.5 Quite different is the nature and reason of that which is against nature. Again, the former is either Alimentary or Excrementitious: The Alimentary which is fit to nourish the body, is that Humor which is con∣tained in the veins and arteries of a man which is temperate and perfectly well; and which is un∣derstood by the general name of blood, which is let out at the opening of a vein. For Blood other∣wise taken, is an Humor of a certain kind, distinguished by heat and warmness from the other Hu∣mors comprehended together with it, in the whole mass of the blood. Which thing, that it may the better be understood, I have thought good in this place to declare the generation of Blood by the efficient and material causes. All things which we eat or drink, are the materials of Blood;* 1.6 which things drawn into the bottom of the Ventricle by its attractive force, and there detained, are turned by the force of concoction implanted in it, into a substance like to Almond-butter. Which thing, although it appear one and like it self, yet it consists of parts of a different nature, which not only the variety of meats, but one and the same meats yields of it self. We term this Chylus,* 1.7 (when it is perfectly concocted in the stomach.) But the* 1.8 Gate-vein receives it driven from thence into the small Guts, and sucked in by the Meseraick-veins, and now having gotten a little rudiment of change in the way, carries it to the Liver, where by the Blood-making faculty, which is proper and natural to this part, it acquires the absolute and perfect form of Blood. But with that Blood,* 1.9 at one and the same time and action all the Humors are made, whether alimentary or excremen∣titious. Therefore the Blood, that it may perform its Office, that is, the faculty of nutrition, must necessarily be purged and cleansed from the two excrementitious Humors: of which the blad∣der of Gall draws one, which we call yellow Choler; and the Spleen the other, which we term Melancholy. These two Humors are natural but not alimentary or nourishing, but of another use in the body, as afterwards we will shew more at large. The Blood freed from these two kinds of Excrements, is sent by the veins and arteries into all parts of the body for their nourishment.