IN t> E X, 



H fdver, 1 1 . How fe~ 

 paratedfrotnfulphur, 202. 

 One of the grand caufes of 

 reducing metals to an ore 

 flate, 202. Pound in mojl 

 eres, 202 feqq. Regula- 

 tion of, bow done, 209. 

 Makes copper white, 210. 

 Near allied to quickfilver, 

 211 

 Atlas-vitriol, 289 



Atrament-ftone, what, 283 



B. 



T>ASALTES, wto, 28 

 " Black-copper, what,\ 10 

 Bronze-metal, wte, 188 



C, 



^ABALLINE-fulphur, 



\f what, 136 



Calamy, what, 187, 190, 



feqq. 

 Cement- waters, what, 109 

 Chalcitis, wto, 280 



Cinnabar, what, 47. i&w/ 

 formed, 97 feqq. 



Cobald, fpecies of, 32 



Copper *'» pyrites, 112 feqq. 

 Nearejl allied to iron, 

 112, 117. Precipitated 

 rather than tranfmuted by 

 iron, ib. Next to iron, 

 the mojl univerfal metal in 

 nature, 112 feqq. Parts 

 not fo readily with itsful- 

 phur, 113. Eafily re- 

 ducible to an earth, ib. 

 Changes to vitriol, 114. 

 Difficult to flux in the 



fire, ib. The hardefl me- 

 tal, ib. Lodges gold ib. 

 Difficultly amalgamates 

 with mercury, 114 feqq. 

 An incidental part of the 

 pyrites, 115. How pro* 

 cured from the pyrites, 1 1 8. 

 Requiring a number of 

 fires to work, 155 



Copper-blooms, what, 31 

 Copper- pyrites, what, 18. 

 Difference in yield, 122 

 Copper- ftone, what, 343 

 Copper-vitriol, what, 283 

 Crude- fmelting, what, 175. 

 Operation of, 343 feqq. 

 Crude-ftone, what, 20, 343 

 Crude-fulphur, what, 136. 

 Contains an aelual iron 

 earth, 137 



D. 



nAMPS, what, 258. 

 *"^ Whence proceeding, ib. 

 Deluge, ^&£fr 0/, <?» ftb 

 mineral kingdom, 64 feqq. 

 Drop-vitriol, w/fo/, 287 

 Drufe, wte, 46 



F. 



P* L Y-poifon, what, 171 

 * Fly-ftone, wto, ib. 



G. 



r"EMS, «t£dfc 40 



^-^ Gilla vitrioli,w£tf/,274 



Gold in the pyrites, 215 



feqq. In what proportion, 



215, 





