CHAP. IIII. Of the Haires of the whole body.
THE haires in Greeke, are called 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉, because wee mowe or poule them. Persius cals them Cirri, from the Greeke verbe 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉, * 1.1 which signifieth to cut. In Latine they are called Pili. Almost euery liuing creature that ingendreth within it selfe is furnished with this couering, some more, some lesse: and yet there are, which in stead of haires, haue prickes, as Hedge-hogges and Porcupines; others haue Feathers, as Birds (& therefore * 1.2 the sauour of Feathers and haires when they are burnt are alike,) others Scales, as Fishes.
Haires are bodyes engendred out of superfluous excrement of the third concoction, torrified by the naturall heate; and they grow especially where the skin is thinnest & most * 1.3 temperate, and where there is for theyr nourishment some proportionable quantitie of moysture. So that for their generation or production and their conseruation, foure things are required. The heate for an efficient cause, the Matter, out of which they are generated * 1.4 or produced, a conuenient place for their production, and fit and competent nourish∣ment, or rather apponed matter to be continuallie ministred for theyr preseruation.
The Matter of the haires is either remote, or more immediate. The remote matter is a * 1.5 superfluous moysture, which the kernels or Glandules which are disposed in the sobby and waterish places of the body could not sucke vp; which moysture therefore is thrust out in∣to the skin. Hence it is, that wheresoeuer there are any Kernels there are also haires: & verily Hippocrates in his Booke de Glandulis, assigneth the same profit vnto them both. The * 1.6 Glandules to receyue that matter which applyeth vnto them; the haires to gather it into their nourishment or for their production, being expelled by nature as a superfluitie. So we see there are Glandules behinde the eares where also are haires, vnder the arme-pittes haires and Glandules; in like manner in the flankes and the groyne. And if in anie part * 1.7 there be Glandules and no hairs, Hippocrates in the place next aboue quoted, rendreth the reason, because there is too great plenty of moysture. For wee see that in sobby and suck∣en grounds seede will not take roote, nay the grasse it selfe will not grow where the water standeth continually.
The next and immediate matter of the haires, according to Galen in the fifte chapter of his second Booke de Temperamen: is a sooty, thicke and earthy vapour, which in the time * 1.8 of the third concoction, when the aliment is turned into true nourishment of the parts, is eleuated by the strength of the action of naturall heate, and passeth thorough the pores of the skin. The efficient cause is as we saide, a moderate action of the naturall heate, which * 1.9 exiccateth or drieth this moysture or these sootie and thicke vapours, and thrusteth them out by the transpirable passages of the skinne. For the vapour being thicke, in his passage leaueth some part of it selfe, to wit, the grossest, in the very outlet where it is impacted, & by a succeeding vapour arising whēce the former did, is protruded or thrust forward; and so * 1.10 one vapour continually solliciting and vrging another, they are wrought together into one body: euen as in chimneyes we see by the continuall ascent of soote, long strings of it are gathered as it were into a chaine. The difference is, that the straitnesse of the passages of the skin, where through the matter of the haires is anoyded, formeth them into a small roundnesse, euen as a wyre receyueth that proportion whereof the hole is, where through it is drawne.
The manner of the out-gate of this matter, is thus. When by the continuall appulsion or arriuall of such vapour to the skin, the pores are plenarily obstructed, then the next vapour * 1.11 that striueth to be at liberty, smiteth the former; which by reason of the straitnesse of the passage, is driuen out into the forme of a cord. He that would see an expresse image of this manner of production, let him resort to a Glasier, when he extendeth his mettall into the