452 



INDEX. 



Potstone, 143, 355. 

 Potter's clay, 372. 

 Pottery, manufacture of, 3*72. 

 Pozzuolana, 355, 367. 

 Prase, 134. 

 x Prehnite, 170. 

 Proustite 327, (Red silver.) 

 Pseudoinalachite, 302. 

 Pseudomorphs, Steatitic, 149. 

 Psilonielane, 259. 

 Pudding stone, 360. 

 Pumice, 357. 



Purple or variegated copper, 294. 

 Pycnite, 194. 

 Pyrenaite, 185. 

 Pyrites, Arsenical Iron, 234. 



Auriferous, 232. 



Capillary, 264. 



Cockscomb, 233. 



Copper, 292. 



Hepatic, 233. 

 ^ Iron, 231. 



Magnetic, 233 



Sickel, 264. 



Radiated, 233. 



Spear, 233. 



Tin, 213 



Variegated copper, 294. 



White iron, 233. 

 Pyrochlore, 208. 



Pyrodmalite, 246, (Pyrosmalite.) 

 Pyrolusite, 259. 

 ^ Pyromorphite, 283. 

 Pyrope, 187. 

 Pyrophyllite, 149. 

 Pyrophysalite, 194. 

 Pyrorthite, 207. 

 Pyrosclerite, 149. 

 Pyrosmalite, 246. 

 Pyroxene, 150. 

 Pyrrhite, 212. 



% Quartz, 132.. 



Amethystine, 134. 

 Aventurine, 134. 

 Ferruginous, 135. 

 Granular, 137, 359. 

 Greasy, 134. 

 Milky, 134. 

 Rose, 134. 

 Smoky, 184. 



Quartz, Tabular, 137 

 Quartz rock, 359. 

 Quicklime, 117, 366. 

 Quicksilver, 287. 



Chlorid of, 288. 



Horn, 288. 

 Quincite, 148. 



R. 



Realgar, 226. 



Red antimony, 224. 



chalk, 237 



cobalt, 267. 



copper ore, 296. 



hematite, 235. 



iron ore, 235. 



lead, 280. 



silver ore, 327. 



zinc ore, 270. 

 Reddle, 237, (Red chalk.) 

 Rensselaerite, 144, 149. 

 Retinalite, 149. 

 Retin asphalt, 95. 

 Retinite, 95. 

 Rhcetizite, 173. 

 Rhodium gold, 311. 

 Rhodizite, 127. 

 Rhodonite, 258. 

 Rhomb spar, 119, 248. 

 Ripidolite, 145. 

 Rock or mountain cork, 154, 



crystal, 133. 



milk, 116. 



salt, 104. 



soap, 162. 

 ROCKS, general remarks on, 84S 



Expansion of, 350. 

 Roofing slate, 357. 

 Rose quartz, 134. 

 Roselite, 268. 

 Rosite, 162. 

 Rubellite, 188. 

 Rubicelle, 160. 

 Ruby, Spinel, 160. 



Almandine, 160. 



Balas, 160. 



Oriental, 158. 

 Ruby silver ore, 327. 

 Rutherfordite, 209. 

 Rutile, 210. 

 Ryacolite, 176. 



