Glycerine, 47. Gneiss, 91. Granite, 91. Grape sugar, 44. Greenstone, 92. Green manuring, 198. Guano, 204. Adulteration of, 211. Application of, 214. Average composition of, 207. Fish, 222. Peruvian, characters of, 209. Phospho-Peruvian, 243. Sombrero Island, 236. Hair, 218. Hay, 286. Heat, evolution of, by plants, 60. Hempseed cake, 286. Hippuric acid, 168. Horn, 218. Hornblende, 89. Humic acid, 21. Humin, 22. Humus, 21, 98, 133. Hydrogen, 10. Ichaboe Guano, 207. Indian guano, 208. Inorganic constituents of plants, 9, 34. Inorganic constituents; Absorption by plants, 38. Proportion in plants, 64. Inorganic constituents of soils, 85. Inuline, 43. Iodine in plants, 76. Iron, protoxide of, in soils, 107. Sulphate of, 182. Sulphuret of, in subsoils, 135. Kaolin, 87. Kooria Mooria guano, 207. Labradorite, 86. Lactic acid, 168. Latham Island guano, 207. Leaves, amount of ash in, 65. As a manure, 202. Legumine, 50. Lichen starch, 42. Light, influence of, on plants, 57. Lime, action of, on soils, 248. As a manure, 245. Bicarbonate of, 122. Carbonate of, 96. Biphosphate of, 237, 260. Humate of, 125 Phosphate of, 96, 233, 258. Sulphate of, 96, 253, 260. Lime-plants, 82. Limestone, 96. Linseed cake, 195. Liquid manure, 166, 187. Madia Sativa, 286. Magnesia, carbonate of, 96. Sulphate of, 182, 233. Magnesian limestone, 96. Malt-dust, 197. Manganese in plants, 73. Oxide of, 73, 87. Chloride of, 182. Mangold-wurzel, 286. Manures, animal, 204. Manures, application of, 165, 186. Fermentation of, 184. Farm-yard, 166, 172. Liquid, 166, 187. Mineral, 226. Theory of, 156. Sewage, 191. Vegetable, 195. Valuation of, 255. Manuring, Green, 198. Principles of, 152. Maple peas, 286. Maracaybo guano, 236. Margaric acid, 47. Margarine, 46. Marl, 245. Mexican guano, 207. Mica, 88. Mica slate, 91. Milk, composition of, 283. Curding of, 51. Mineral constituents of plants, 9, 63. Mineral manures, 226. Mineral matters in different crops, 270. In animals, 281. Moisture, influence of, on germination, 55. Mucilage, 44. Natrolite, 90. New Island guano, 208. Niger cake, 286. Night-soil, 217. Nitrate of potash, 229. Nitrate of soda, 229, 260. Nitric acid, absorbtion of, by plants, 30, 38. Decomposition of, by plants, 62. In drainage water, 112. In dew, 19. In air, 17. In fog, 19. Production of, 11, 33. Nitrification, 11. Nitrogen, amount in a six-course rotation, 160. Amount of, in different crops, 270. Presence in the atmosphere, 11. Properties of, 11. Proportion of, in plants, 11. Nitrogenous constituents of plants, 48, 286. Nitrogenous constituents of animals, 48, 281. Oats, 286. Proportion of ash in, 68, 70. Oil-cakes, 195, 286. Oils, sweet principle of, 47. Oily matters, 46. Oleic acid, 47. Oleine, 46. Oligoclase, 86. Oolitic limestone, 96. Organic constituents of plants, 8. Sources of the, 13, 20.