INDEX. 



387 



Heat, radiant, 350-359. 

 specific, 284-285. 

 Heliostat, 352. 

 Hoarfrost, 51, 52. 

 Hydriodic acid, 195. 

 Hydrobromic acid, 195. 

 Hydrochloric acid, decomposition of, 15, 16, 



18, 19, 121, 136, 215. 

 properties of, 100, 129, 137, 



139, 141, 152, 158, 169, 170, 

 194, 195, 216, 221. 

 formation of, 159, 160, 196, 



197, 198. 



test for, 64. 



Hydrofluoric acid, 225, 226. 

 Hydrogen, 185. 



,, preparation of, 111, 238. 

 properties of, 111-115, 189, 190, 

 191, 192, 193, 196, 197, 198, 

 217, 223, 276, 277, 380. 

 ,, produced from steam, 213. 



water, 156, 211, 



212, 213. 



separation of. from hydro- 

 chloric acid, by iron, 121 ; by 

 zinc, 15, 16, 87-90. 



sulphide, decomposition of, 18, 



19, 103, 126, 129, 150, 151, 221. 



j, properties of, 141, 142, 



209, 235, 254. 



synthesis of, 18, 187. 



Hydroquinone, 366. 

 Hydroxylamine, 366. 



ICE, decomposition of, 213. 

 formation of, 27, 30, 34-36. 

 properties of, 83, 285, 286, 358. 

 Ices, how to make, 27, 28. 

 Images formed by lenses, 338-349. 



, , , , by mirrors, 334-336. 



Incineration, 127. 

 India'-rubber, 73, 85, 87, 89, 90. 

 Indigo, blue, 146, 245. . 



,, white, 146. 

 Ink, 249, 250. 

 Ink marks, 137. 



Instantaneous photographs, 364, 365. 

 Intensification, 367, 368, 369. 

 Interference of light, 329. 

 Iodine, 58, 59, 297, 352. 

 Iridescence, 23, 25, 328, 329. 

 Iron, crystalline structure of, 25. 



properties of, 90. 121, 187, 213, 222, 



223, 264, 265, 274, 275, 284. 

 Iron acetate, 246. 

 chloride (ferric), diffusion of, 100. 



,, ,, properties of, 127, 



128, 129, 130, 141, 

 204, 236, 253, 254, 

 367. 



synthesis of,18,19,131. 



(ferrous), 121. 



,, mould, to remove, 137. 



,, oxide, properties of, 240. 



,, synthesis of, 23, 204, 205, 213. 



,, prints, 374. 



,, sulphate, 133, 151, 248, 249. 



(ferrous), 121, 366. 



,, sulphide, decomposition of, 18, 141. 



synthesis of, 187, 223. 



KALEIDOSCOPE, 309-311. 



LACTIC acid, 228. 

 Lakes, 248. 



Latent image, development of, 365-367. 

 Laughing gas. See Nitrous oxide. 

 Lead, casting, 22, 23. 

 ,, properties of, 93, 94, 209, 235, 236, 



264, 284. 



,, reduction of, 222. 

 test for, 125, 126, 127. 

 Lead acetate, 118, 129, 130, 132, 150, 151, 



227, 236, 247. 



chloride, decomposition of, 16. 

 ,, chrpmate, 127. 

 ,, iodide, crystals, 67. 



,, formation of, 16. 

 nitrate, decomposition of, 19. 

 properties of, 100. 

 ., formation of, 118. 

 oxide, properties of, 117, 118, 222. 



,, formation of, 23. 

 ,, sulphate, 227. 

 ,, sulphide, formation of, 19, 151. 

 tartrate, 236. 

 tree, 132. 

 Lenses, 336-349. 

 Light, 180, 181, 281, 288-359. 



sources of, 288, 289. 

 Light-mill, 357. 

 Lightning, 289. 

 Limelight, 192. 

 Limestone, 107, 108. 

 Limewater, 135, 146, 147, 148, 199. 

 Linen, 245-247. 



Liquids, physical properties of, 1-3. 

 Litmus, 135, 138, 153, 155. 

 Logwood, 248. 

 Luminous paint, 383, 384. 



MADDER, 246. 

 Magic lantern, 340, 341. 

 ,, mirrors, 307-309. 

 Magnesia, 117, 204. 

 Magnesium, 204, 225. 



acetate, 117, 227. 



sulphate, 117, 136, 227. 



Malt, 173, 174. 



Manganese dioxide, 162, 169, 170. 

 Manuite, 173. 

 Matches, 217. 



Membranes, permeability of, by gases, 85. 

 ,, ,, ,, by water, 47, 



48. 



Mercurial trough, 164, 165. 

 Mercury, 72, 73, 132, 133, 156, 158, 169, 170, 

 209, 223, 233, 234, 235, 241, 

 242, 250, 251, 252, 282, 283. 

 ,, to solidify, 28, 54, 55. 

 Mercury bromide, 209. 

 cyanide, 170. 

 nitrate, 118, 133, 156, 158. 

 oxide, 118, 169. 

 perchloride, 129, 130, 158. 

 sulphate, 156. 

 sulphide, 223. 

 Metal, 376-378. 

 Methylamine, 138, 139, 185. 

 Microscope, 339, 340, 348, 349. 

 Milk, 97-99, 228. 



