384 



INDEX. 



Grapes, 382, 498. 

 Grass, 266, 887, 904. 

 Gravity, 54. 



— specific, 84^ 405. 

 Greaves, 819. 

 Green manures, 854. 



— vitriol, 270, 794. 

 Growth of plants, 736. 

 Guano, 610, 789, 814. 

 Gum, 335. 



— Arabic, 335. 

 -— British, 360. 



— cherry-tree, 335. 



— formation of, 359. 



— resins, 540. 

 Gun-cotton, 322. 

 Gunpowder, 208. 

 Gutla percha, 134. 

 Gyle tun, 423. 

 Gypsum, 237, 794, 876. 



H. 



Hair, 660. 

 Hard water, 239. 

 Hartshorn, 154. 

 Hay, 549, 984. 

 Heat, 48, 62. 



— animal, 107, 606, 787. 



— influence of, on plants, 702. 



— latent, 48. 



— sensible, 48. 

 Hedges, foul, 807. 

 Hemp-seed, 957. 

 Hollands, 407. 

 Honey, 394. 

 Hoofs, 589. 

 Hops, 420, 430. 

 Hordein, 915. 

 Horn, 589, 820. 

 Humates, 680. 

 Humic acid, 679. 

 Humus, 672. 



— decay of, 677. 



— excess of, 740. 



— use of, 678. 

 Hydrogen, 69, 82. 

 Hydrogen, carburetted, 83, 131. 



— lightness of, 84. 



— sulphuretted, 182, 211. 



Ice, 45. 



Iceland moss, 331. 



Indian corn, 325, 929. 



— rubber, 134. 

 Indigo, 542. 

 Inflammable air, 81. 



Inorganic matter in plants, 644, 

 870. 

 — manures, 871. 

 Inulin, 334, 957. 

 Iodides, 193. 

 Iodine, 193. 



— in sea water, 193. 

 Iron, 274. 



— combustible, 282. 



— galvanized, 314. 



— in coal, 287. 



— in plants, 274, 553. 



— in soils, 286. 



— in water, 286. 



— moulds, 505. 



— ores, 274. 



— oxides of, 277, 288, 324, 542. 



— peroxide of, 277. 



— protoxide of, 277. 

 — • pyrites of, 283. 



— rust, 279. 



— contains ammonia, 280. 



— slags, 276. 



— smelting, 275. 



— sulphate of, 270, 285, 289. 



— sulphuret, 284. 

 Irrigation, 860. 

 Isinglass, 391, 590. 

 Ivory, 595. 



J. 



Juniper, 407. 



Kelp, 218, 879. 

 Kidneys, 609. 

 Kiln-drying, 692. 

 Kirschwasser, 398. 



