424 



INDEX. 



Gunpowder, explosion of, explained, 



293. 



Gutta-percha, 529. 

 Gypsum, 319. 

 Gypsum in agriculture, 505. 



II. 



Hard soap, 518. 



Hare's blowpipe, 188. 



Harmonica chemica, 151. 



Hatcheling, 431. 



Heat, relations of, to forms of sub- 

 stances, 9. 



Hematite, 338. 



Hibernation, 205. 



Hibernation, warmth in, 567. 



Homologues and isologues, 420. 



Honey, 465. 



Humus, 490. 



Hydrates, 80. 



Hydrocarbons, ethylene series of, 

 419. 



Hydrocarbons in petroleum, 443. 



Hydrocarbons of illuminating gas, 

 154. 



Hydrochloric acid, production of, 

 223. 



Hydrogen and respiration, 152. 



Hydrogen, arsenetted, 360. 



Hydrogen, combustibility of, 148. 



Hydrogen compared with carbonic 

 anhydride, 146. 



Hydrogen, metallic nature of, 156. 



Hydrogen not a supporter of com- 

 bustion, 150. 



Hydrogen peroxide, 155. 



Hydrogen, phosphoretted, 255. 



Hydrogen, preparation of, by iron 

 and steam, 142. 



Hydrogen, preparation of, by zinc 

 and sulphuric acid, 143. 



Hydrogen, sounds in, 153. 



Hydrogen, specific gravity of, 145. 



Hydrogen, sulphuretted, 248. 



Hydroxyl, 421. 



India rubber, 529. 



Indigo, 532. 



Ink, sympathetic, 349. 



Ink, writing, how made, 512. 



Instability of organic bodies, 413. 



Iodine a supporter of combustion, 



230. 



Iodine, preparation of, 229. 

 Iodine, production of, 228. 

 Iridium, 387. 

 Iron, abundance of, 337. 

 Iron, galvanized, 334. 

 Iron in the animal kingdom, 579. 

 Iron, oxides of, 338. 

 Iron, production of, from ores, 340. 

 Iron, pure, 336. 

 Iron, sulphides of, 346. 

 Isologues and homologues, 420. 

 Isomerism defined, 415. 

 Isomerism explained, 416. 

 Isomorphism, 328. 



K. 



Kelp, 228. 



Kerosene, unsafe, 445. 



Kirchhoff, 402. 



Kol-cannon, foot-note on p. 403. 



L. 



Lagoons of Tuscany, 269. 



Lakes, 327. 



Lamp, Dobereiner's, 385. 



Lampblack, 92. 



Lana philosophica, 331. 



Laughing-gas, 81. 



Lavoisier, 17, 48. 



Laws of chemical combination, 27, 



30, 31. 

 Lead, 369. 

 Lead acetate, 373. 

 Lead, oxides of, 370. 

 Lead-pencils, 99. 

 Lead-poisoning, 372. 



