iNDEX. 



451 



Obsidian, 357. 

 Ocher, Red, 237. 



Brown or yellow, 239. 



Cerium, 206. 



Plumbic, 280. 



Uranie, 228. 



Chromic, 262. 

 Octahedrite, 211, (Anatase.) 

 (Erstedite, 202. 

 Oil, Genesee or Seneca, 96. 



Mineral, 95. 

 Okenite, 142. 

 Oligiste iron ore, 237. * 

 v 01igoclase, 179. 

 Oligon spar, 248. * 



Olivenite, 301. 

 Olivine, 166. 

 Onyx, 136. 

 Oolite, 116. 

 Opal, 139. 



Ophite, 145, (Serpentine.) 

 Ores, general remarks on, 202. 

 Orpiment, 226. 

 Orthite, 207. 

 X)rthoclase, 176. 

 Ottrelite, 193. 

 Ouvarovite, 185. 

 Oxalate of iron, 249. 

 Ozarkite, 167. 

 Ozocerite, 97. 



P. 



Packfong, 265. 

 Paisbergite, 259. 

 PALLADIUM, 311. 

 Pargasite, 154. 

 Parisite, 206. 

 Peastone, 116, (Pisolite.; 

 Pearl spar, 119. 

 Pearlstone, 357. 

 Pecto lite, 142. 

 Peloconite, 261. 

 Pennine, 149. 

 Periclase, 149. 

 Peridot, 156, (Chrysolite.) 

 Perofskite, 212. 

 Petalite, 182. 

 Petroleum, 95. 

 Phacolite, 170. 

 ^harmacolite, 226. 



Phenacite, 200. 



Phillipsite, 168. 



Phlogopite, 193. 



Pholerite, 162. 



Phonolite, 356. 



Phosphorite, 120. 



Phosphuretted hydroger, 77. 



Photizite, 258. 



Phyllite, 193. 



Physalite, 194. 



Piauzite, 97. 



Pickeringite, 129. 



Picrolite, 146. 



Picrophyll, 331. 



Picrosmine, 149. 



Pimelite, 264. 



Pinchbeck, 307 



Pinguite, 245. 



Pinite, 162. 



Pipe clay, 372. 



Pipestone, 358. 



Pisolite, 116. 



Pistacite, 183. 



Pitchblende, 228. 



Pitchstone, 357. 



Pitchy iron ore, 260, (Triplite/ 



Pittiz'ite, 246. 



Plagionite, 302. 



Plasma, 136. 



Plaster of Paris, 114. 



Platin-iridium, 310. 



PLATINUM, 308. 



Pleonaste, 160 



Plumbago, 91. 



Plumbic ocher, 280. 



Plumbo-calcite, 117. 



Plumbo-resinite, 285. 



Polybasite, 327. 



Polycrase, 209. 



Polyhalite, 127. 



Polyhydrite, 245. 



Polylite, 151. 



Polymignite, 209. 



Poo'nahlite, 167. 



Porcelain, manvfacture of, 872. 



Porcelain clay, 872. 



Porcelain jasp.r, 137. 



Porphyry, 856. 



Porphyritic granite, 351. 



Potash, Nitrate of, 101. 



Potash, Salts of, 101. 



Potassium, Chlorid of 102. 



