from the Pyrites. 287 



do not denote a difference in the thing itfelf, but 

 only a different method of production or prepara- 

 tion, or fomething incidental, &c. 



Viiriolum fiillatitium, Jlala fifties, fialagmites, or 

 drop-viincl, fignify only the figure of this metallic 

 fait, in icicles, jag?, and flakes, fuch as is to be 

 found in mines, like a froze- water, or an ice 5 

 alio fuch as ufually fettles in the pans, trunks, and 

 \tSds of the vitriol-huts. 



Vitriolum concreticum, or condenfatum, according 

 to Diofcorides and Galen, is that procured from 

 vitriolic groove-waters, by a fpontaneous evapora- 

 tion in the open air. Caneparius, from Diofco- 

 rides, alledges the concreted not to be fo good as 

 the drop fort, but this may be meerly incidental, as 

 one fort may happen to be more faturated, and 

 richer in colour; another, more watery, confequent- 

 ly poorer ; but even this laft may be heightened in 

 virtue by a more flow evaporation and (hooting, as 

 by this means falts come to acquire more of com- 

 paclnefs and body. 



Vittiolum cofiiile, or vulgar e^ boiled or common 

 vitriol, is the fort elixated with water from vitrio- 

 lic ores, earths, and (tones, particularly from py- 

 rites , and procured from the lie by boiling and cry- 

 ftallifation, as is the ufual way in the vitriol-huts. 

 *Tis called vulgare, as being what is commonly 

 fold, and at an eafy rate ; alfo, as it yields another 

 boiled vitriol, which may be called artificial, or 

 prepared by art, namely, from a metal, and a vi- 

 triol-acid, which mud needs be right pure and fine, 

 and, on account of its coftlinefs, really uncom* 

 mon ; though in fact this diftinction be immaterial, 

 as all faleable vitriol^ with us, is prepared by elixa- 



tion 



