An Explication of the Frontis- 

 piece. 



i, TS exhibited a fulphur hut, with the re- 

 •*• verberating furnace and retorts, in which 

 the fulphur is driven or forced out of the Py- 

 rites. 



2. In the vitriol hut is reprefented the leaden 

 pan, in which the vitriol is boiled out of the Py- 

 rites, together with a wafhing trough. 



3. In the third hut, the defulphurated Pyrites is 

 lixiviated, and prepared for making vitriol. 



4. In the arfenic hut ftands the reverberating 

 furnace, with the dirties and fubliming vefTels ouc 

 of which the arfenic is forced. 



5. A coe or hut over the mouth of the fhaft. 



6. The mouth of a level. 



7. A fhaft, with the windlafs, all having * 

 relation to mining. 



And as hot baths, vulcano's and whirlpools, 

 derive their matter from Pyrites and fulphur* 

 fomething about them is alfo exhibited. 



A 2 ADYER. 



