388 



INDEX. 



Mirage, 301-303. 



Mirrors, 241, 242, 307-309, 332-336, 353-355, 



Monochromatic colour, 320. 



Mordant, 245-247. 



NAPHTHALENE, 191. 

 Naphthalene red, 382. 

 Negatives, 365. 

 Nettle beer, 175. 

 Nickel chloride, 130. 

 Nitre. See Potassium nitrate. 

 Nitric acid, properties of, 117, 118, 119, 120, 

 121, 122, 156, 172, 199, 203, 225, 226 

 227, 248. 



oxide, 156, 199, 200, 214, 215. 

 Nitrogen, 144, 145, 170, 171, 172, 184, 185, 



214, 218. 

 Nitrous oxide (laughing gas), 164, 172, 173, 



214. 

 Nutgalls, 249. 



OCCLUSION, 87-91, 231-241. 



Oil of turpentine, 191, 266. 



Oils, 93, 95-97. 



Oleine, separation of, from olive oil, 29, 30. 



Opacity, 296. 



Opaque objects, to see through, 312. 



Ordinary ray of light, 328. 



Osmosis, 101. 



Oxalic acid, 137, 228. 



Oxidation, 23. 



Oxygen, 87, 144-146, 162, 168, 169, 171, 172, 

 179, 180, 185, 186, 188, 189, 191, 192, 193, 

 196, 199, 200, 201, 202, 204, 205, 209, 214, 

 215, 217, 218, 223, 224, 235, 236, 239, 271, 

 277, 381. 



PALLADIUM, 86-90. 

 Paper, 177. 



Parchment paper, 104. 

 Pepper's ghost, 303-305. 

 Perspective, 323. 

 Phenol-phthalein, 138. 

 Physical state, relation of, to pressure, 13, 

 14, 38-40; to temperature, 12, 13, 21-37. 

 Phosphine, 195. 

 Phosphonium iodide, 195. 

 Phosphorescence, 289, 382, 384. 

 Phosphoric acid, 2u8. 

 Phosphorus, 134, 171, 172, 205, 206, 207, 214, 



215, 290, 383. 

 oxide, 171. 



pentoxide, 208. 



Photography, 359-380. 

 Photolithography, 378-380. 

 Plants, 180. 

 Plaster of Paris, plasticity of, 6-9. 



,, properties of, 104, 113, 114, 



227,228. 

 Plasticity, 3-11. 

 Platinotypes, 375. 

 Platinum, 90, 182, 185, 236, 237, 238, 239, 



265, 266, 374. 

 chloride, 182, 375. 

 Pneumatic trough, 162, 163. 

 Polarisation of light, 328. 

 Porcelain, 232. 

 Positives, 365. 

 Potash, caustic, 141, 155. 

 Potassium, 213. 



bitartrate, 222, 223. 



Potassium carbonate, 128, 140, 141. 



chlorate, 162, 169, 216, 217, 220. 

 chloride, 16. 

 ,, ,, formation of, 16, 129. 



,, chromate, decomposition of, 



17, 18, 127, 130. 

 cyanide, 363, 366. 

 ferricyanide, 121, 157, 367, 374, 



375. 

 ferrocyanide, 100, 103, 127, 128, 



129, 254. 



iodide, crystals, 68. 

 ,, ,, decomposition, 16-18, 



129, 130, 154, 169. 



,, nitrate (nitre), properties of, 

 156, 157, 218, 219, 220, 225. 

 ,, formation of, 18. 



oxalate, 137, 366. 

 sulphate, 225. 

 ,, sulphocyanide, 128. 

 Precipitation, 122-135. 

 Pressure, influence of, on physical state, 



13, 14. 



Pseudoscope, 323, 325, 326. 

 Pyrogallic acid, 144, 366. 

 Pyrophoric metals, 235, 236. 

 Pyroxylin, 360. 



QUARTZ, crystals of, 25. 



Quicklime, 140, 146, 208, 209, 221, 290. 



Quinine sulphate, 290, 315, 381. 



RADIANT energy, 272, 357. 

 Radiation, 272. 



of heat, 355, 357. 

 Rainbow, 329-331. 

 Red cabbage fluid, 138. 

 Reflection of heat, 350, 333-336. 



of light, 292, 293, 294, 329-336. 



,, total internal, 298, 299, 



300. 

 Refraction of heat, 350, 351. 



of light, 292, 293, 294, 295, 296, 

 312-316, 327, 328, 329-331, 

 337-349. 



Regelation, 35, 36. 

 Retina, 344. 

 Rock salt, 297, 352. 



SAFETY jet, 277. 



lamp, 276-278. 



Salammoniac. See Ammonium chloride. 

 Salt. See Sodium chloride. 

 Sand, 71. 

 Sawdust, 178. 

 Scattering of light, 291. 

 Sealing wax, plasticity of, 6. 

 Silicic acid, 129. 

 Silk, 244, 245. 

 Silver, 87, 94, 121, 122, 158, 181-182, 216, 



235, 265, 266, 297, 298. 

 Silver bromide, 361. 



chloride, properties of, 181, 315, 316. 



,, formation of, 18, 122. 

 chromate, formation of, 18. 

 hydroxide, formation of, 18. 

 iodide, 361-367. 



,, formation of, 18. 

 nitrate, decomposition of, 18, 19, 132, 



133, 181, 182, 361. 

 phosphate, formation of, 18. 



