And whereas it cannot be denyed, that by the use of the Baths most grievous diseases which cannot be cured by Physitians, are happily cured; I was willing for the sake of my neighbour to publish this instrument together with the preparation of mineral waters; which publishing will not without doubt be without profit, and advantage. Wherefore I will in brief shew you the preparation of mineral, and sweet waters, and their use, and first, _Of a Bath of sweet or common water._ There is no art to make a Bath of sweet water, for you have nothing else to do, then to fill your vessel with river or rain water, and to make a fire, which by the help of the copper globe will heat the water, which being sufficiently heated, you may sit in it, and cover the Tub, that the hot vapors evaporate not, nor the cold air enter in, and cool the exteriour parts of the body: Wherefore also you must apply a clean linnen cloth about your neck, lest the warm vapors evaporate there: which being rightly observed, you may sit the space of 1. 2. 3. hours, or as long as you please or your sickness require. You must keep a continual heat as much as is necessary, which may be done by the help of that globe. If you be thirsty in the mean time you may drink some proper distilled drink according to the nature of your disease, of which thing nothing now, because I am resolved to write a peculiar _book de Balneis_, and here only to shew the use of that copper globe in heating of Baths. And although there be not a perfect instruction of all, yet of some Baths, and their uses there shall a short instruction be given in this place. _Of the nature, and property of natural Baths._