34^ The Uses 



veffel, there to fine: then this lie is poured in- 

 to the lead-pans, and boiled, and frefh lie al- 

 ways gradually poured in, that the pan may (till 

 remain full ; according as the lie is ftrong or fmall, 

 more or lefs vitriol is procured •, generally, a pan 

 amounts to between fix and fcven centners. In the 

 boiling, care is to be had, that no lort of tallow, oil, 

 butter, or greafe, come nigh it, otherwife the Jod 

 or boiling is marred •, and when it begins to have a 

 fkin, it is enough, and then xhzfod is let out into 

 a large trough, wherein it may alfo fine ; from this 

 it is (hared out into fhooting-troughs, one of which 

 generally yields one half centner of vitriol. In the 

 fhooting-troughs pieces of wood are fufpended, 

 whereon the vitriol may hang and moot •, the re- 

 maining fid, from which the vitriol is (hot, is 

 poured again into the pan to a frefh lie. At times, 

 frefh roafts muft be ufed for it, and that every week, 

 for the lixiviated pyrites to be again burnt, and again 

 lixiviated; they are fo often ufed, 'till at laft they 

 mull be fifted, tofeparate the fmail parts, which are 

 of no more fervice, and though fluxile in fmelting, 

 yet give no ft one or regulus. Sometimes the vitriol 

 refufes to moot duly, and here the matters ufe a 

 peculiar piece of (kill, which they will not readily 

 difclofe. In other places, where no fulphur is 

 made, they ufe new and old pyrites, of which they 

 make feven roads, each at forty fix centners -, em- 

 ploy four large lie-trunks, and procure from the 

 feven roafts in a week about forty centners of vi- 

 triol; for which there muft be every week employed 

 above one hundred centners of new pyrites *. 



III. To 



* Rofier's Berg-bau-fpiegel, Lib. VI. c. 17. p. 156. feq. 

 Lokneifs, p 529. 



