17.
Production of, 12.
Properties of, 12.
Proportion of, in air, 16, 20.
Proportion of, in drain water, 112.
Proportion of, in soils, 107.
Sulphate of, 29, 227.
Sulphomuriate of, 227.
Urate of, 205.
Valuation of, 259.

Ammoniacal liquor, 229.

Amylaceous constituents of plants, 40.

Angamos guano, 207, 210.

Animal charcoal, 224.
Manures, 204.

Animals, composition of, 281.
Nitrogenous constituents of, 48, 281.

Apatite, 235.

Ascension Island guano, 208.

Augite, 89.

Australian guano, 207.

Avenine, 50.

Barks, amount of ash in, 66.

Barley, 286.

Barrenness of soils, 109.

Basalt, 92.

Beans, 286.

Bere, 286.

Biphosphate of lime, 237, 260.

Bird Island guano, 208.

Blood as a manure, 220.

Bone ash, 234.

Bone oil, 229.

Bones as a manure, 223.
Dissolved, 237.

Box-feeding, 183.

Bolivian guano, 207, 210.

Bran, 197, 286.

Burning, improvement of soils by, 146.

Cabbage, 286.

Cane sugar, 43.

Carbon, properties of, 10.
Proportion of, in plants, 10.

Carbonate of ammonia, 29.
Lime, 96, 247.
Magnesia, 96.
Potash, 232.
Soda, 232.

Carbonic acid, absorption of, by plants, 37.
Decomposition of, by plants, 57.
Evolution of, by plants, 58.
How obtained, 10.
Properties, 10.
Proportion of, in air, 15, 20.

Carburetted hydrogen, 19.

Calcium, sulphuret of, 252.

Caramel, 44.

Carrot, 286.

Caseine, 50, 283.

Castor cake, 195.

Cattle food, composition of, 286.

Cellulose, 40.

Cerine, 48.

Cerotic acid, 48.

Chaff, 197.

Chalk, 96, 245.

Charcoal, animal, 224.

Chilian guano, 207.

China-clay, 87.

Chloride of potassium, 73, 102.
Sodium, 73, 232.
Manganese, 182.

Clay, 87.
Absorbent action of, 121.
Composition of, 95.
Source of, 88, 94.

Clay-slate, 95.

Classification of plants, 81.

Coprolites, 98, 235.

Coral sand, 246.

Cotton cake, 195, 286.

Crenic acid, 21.

Crops, Mineral matters in, 270.
Nitrogen in different, 270.
Rotation of, 81, 266.

Deep Ploughing, effects of, 144.

Dew, ammonia in, 17.
Nitric acid in, 19.

Dextrine, 43.

Diastase, 43, 53, 55.

Diorite, 92.

Dissolved bones, 237.

Dolerite, 92.

Dotter cake, 286.

Drainage water, analyses of, 112.

Draining, 138.

Dung, composition of, 170.

Dung heaps, management of, 179.

Earth-nut cake, 286.

Emulsine, 50.

Exhaustion of soils, 81.

Farm stock, feeding of,