First, that although all medicinall waters doe participate of those mineralls, by which they doe passe, yet they have them but weakly (_viribus refractis_) especially when in their passages they touch, and meet with divers others minerals of opposite tempers and natures. Secondly I answer, that in all such medicinall fountaines, as this, simple water doth farre surpasse and exceed in quantity, whatsoever is therewith intermixed; by whose coldnesse it commeth to passe, that the contrary is scarce, or hardly perceived. For example, take one proportion of any boyling liquor to 100. or more, of the same cold, and you will hardly find in it any heat at all. Suppose then vitrioll to be hot in the third degree, it doth not therefore follow, that the water, which hath his vertue chiefly from it, should heat in the same degree. This is plainly manifest not onely in this fountaine, but also in all others, which have an acide taste, being indeed rather cold, then hot, for the reasons above mentioned. _CHAP_. 10. _=Of the effects, which this fountaine worketh, and produceth in those who drinke of it.=_. Experience sheweth sufficiently, besides reason, that this water first, and in the beginning cooleth such, as use it: But being continued it heateth and dryeth; and this for the most part it doth in all, yet not alwayes. For (as we shall more fully declare afterwards) it effecteth cures of opposite, and quite contrary natures, by the second and third qualities, wherewith it is endowed, curing diseases both hot, cold, dry, and moist. Those waters (saith _Renodæus_) which are replenished with a vitrioline quality, as those at the _Spaw_, doe presently heale, and (as it were) miraculously cure diseases, which are without all hope of recovery; having that notable power, and faculty from vitrioll; by the vertue and efficacy whereof, they passe through the meanders, turnings, and windings of all parts of the whole body. Whatsoever is hurtfull, or endammageth it, that they sweepe and carie away: what is profitable and commodious, they touch not, nor hurt; that, which is flaccid, and loose, they bind and fasten: that, which is fastened, and strictly tyed, they loose: what is too grosse and thicke, they incide, dissolve, attenuate, and expell. More particularly, the water of this fountaine hath an incisive and abstersive faculty to cut, and loosen the viscous and clammy humours of the body, and to make meable the grosse: as also by its piercing and penetrating power, subtilty of parts, and by his deterging and desiccative qualities to open all the obstructions, or oppilations of the mesentery (from whence the seeds of most diseases doe arise and spring) liver, splen, kidneis, and other interiour parts, and (which is more to be noted and observed) to coole and contemperate their unnaturall heat, helping, and removing also all the griefes and infirmities depending thereupon.