Naphtha, i. 357. ii. 240 Negative electricity, i. 25. 161. 185 Nerves, ii. 279. 298. 308 Neutral, or compound salts, i. 333. ii. 4. 22. 69 Nickel, i. 13. 343 Nitre, or nitrat of potash, or saltpetre, ii. 32. 104. 116 Nitric acid, ii. 100 Nitrogen, or azot, i. 181. ii. 100 ---- gas, i. 182. 211 Nitro-muriatic acid, or aqua regia, ii. 144 Nitrous acid gas, ii. 101. 106 ---- air, or nitrit oxyd gas, ii. 107 Nitrats, ii. 116 Nitrat of copper, ii. 5 ---- ammonia, ii. 113. 118 ---- potash, or nitre, or saltpetre, ii. 32. 104. 116 ---- silver, or lunar caustic, ii. 19 Nomenclature of acids, i. 264. ii. 69 ---- compound salts, ii. 4. 22 ---- other binary compounds, i. 278 Nut-galls, ii. 98. 199 Nut-oil, ii. 178 Nutrition, ii. 297 O Ochres, i. 320 Oils, i. 285. ii. 306 Oil of amber, ii. 241 ---- vitriol, or sulphuric acid, ii. 80 Olive oil, ii. 178 Ores, i. 315 Organized bodies, ii. 159 Organs of animals, ii. 290. 310 ---- vegetables, ii. 159. 265. 271 Osmium, i. 14. 348 Oxalic acid, ii. 74. 197 Oxyds, i. 198 Oxyd of manganese, i. 117. 317 ---- iron, i. 204. 319 ---- lead, i. 319 ---- sulphur, ii. 91 Oxydation, or oxygenation, i. 196 Oxygen, i. 11. 181. 201. 211 ---- gas, or vital air, i. 182. 201 Oxy-muriatic acid, ii. 140 Oxy-muriats, ii. 153 Oxy-muriat of potash, ii. 155 P Palladium, i. 13. 348 Papin’s digester, i. 120. ii. 284 Parenchyma, ii. 256. 266 Particles, i. 16 Pearlash, ii. 24 Peat, ii. 242 Peculiar juice of plants, ii. 268 Perfect metals, i. 14. 324 Perfumes, i. 308. ii. 183 Perspiration, ii. 333. 329 Petrification, ii. 237 Pewter, i. 344 Pharmacy, i. 14 Phosphat of lime, ii. 99. 299 Phosphorated hydrogen gas, i. 277 Phosphorescence, i. 29 Phosphoric acid, i. 273. ii. 99 Phosphorous acid, i. 274. ii. 99 Phosphorus, i. 270 Phosphoret of lime, i. 278. 341 ---- sulphur, i. 279. 341 Pitch, ii. 187 Plaster, ii. 65 Platina, i. 14. 323 Plating, i. 345 Plumbago, or black lead, i. 304 Plumula, ii. 257 Porcelain, ii. 56 Positive electricity, i. 25. 161. 185 Potassium, i. 13. 357. ii. 15 Pottery, ii. 56 Potash, i. 356. ii. 22 Precipitate, i. 22 Pressure of the atmosphere, i. 112. 116 Printer’s ink, ii. 144 Prussiat of iron, or prussian blue, ii. 291 ---- potash, ii. 291 Prussic acid, ii. 75. 290 Putrid fermentation, ii. 235. 360 Pyrites, i. 341. ii. 97 Pyrometer, i. 38. 42 Q Quick lime, ii. 59 Quiescent forces, ii. 12 R