¶Of Nitro. chap. 70.
NItrum (as Isidore saith) is a stone some deale white, and maye be he∣wen and clouen, and is full cléere. The vertue thereof dissolueth and tempereth, draweth and cleanseth, and wasteth su∣perfluities of humours. Lib. 16. cap. 2. Isidore saith, that Nitrum hath ye name of the countrey of Nitria that is in Ae∣gypt. Thereof is medicine made, & there with bodies and clothes be cleansed and washed. The kinde thereof is not farre from the kinde of salt, for it hath yt kind of salte, and is made right as salt in dri∣nesse in olde cliues.
The foame thereof, is called Af∣fronitom, and is gendred dropping down in the countrey of Asia, and then dryed with heate of the Sun, and what is best dryed, is least heauie as Isidore sayeth. And Platea sayeth, ye Nitrum is a veyne of the earth, and is hot and drye, light, red, or white or citrine, & is bitter, sowre, and some deale salte in sauour. Nitrum abateth falnesse. If it be taken in the mouth, and consumeth and wasteth glei∣mie humours. Powder thereof consect in honie, clarifieth & maketh the face faire, & cleanseth scabs and matter of the sto∣macke and of the guts, if it commeth of a postume, and cleanseth lyce, and head scabs, and slayeth wormes of the eares, cleanseth most perfectlye the matter and scabs thereof. Fome thereof with vine∣ger, healeth gnawing and swelling, and helpeth against the dropsie, and cleanseth dimnesse of eyen, if it be meddeled with honie, and slayeth venime, and destroyeth it, and withstandeth mightely the palsie of the tongue, as Plat. saith and Diosco∣rides also. And Nitium is hot and drie in the ende of the third degree, and laxeth and cleanseth, as Isidore saith.