INDEX. 



Page. 



Acclimation often difficult, 33 



Accounts, importance of keeping, 254 



Acetous fermentation, 117 



Acids, combinations of, 62, 65, G6 



Adhesion, force of, 19,20 



Agriculture, definition of, 



Air, moisture in the, 37, 140 



Air, weight of the, 6, 26, 27, 28 



Albumen in the body, 71 



Alkali, properties of, 63,271,272 



Alimentary plants, 55, 56 



Alumina, abundance of, 78, 79 



Aluminum, basis of clay, 65, 79 



Amaryllis family, the, 54 



Amendments for special soils, . 94, 95 



Ammonia essential to food of plants, . . .11, 12, 39, 59, 63, 103, 107 

 Animal heat sustained by combustion, . . . ; . . 13 



Animal life, force of, . . . . V . . . 20 



Animal fibrin essential part of muscle, 71, 269 



Animals, treatment of, 239, 247 



Apples, ripening of, 252 



Apple-tree caterpillar, mode of destroying, 223, 224 



Apple-tree borer, protecting trees from the, 225, 226 



Argillaceous or clay soils, 75, 78, 94 



Army worm, ravages of the, 230, 231 



Arrow-root, starch in, , 68 



Artichoke, culture and qualities of the, 187 



Artificial system, ......... . 50 



Ashes of plants, 61,104,105,203 



Atmosphere, elements of the, 37, 39, 87, 96, 97, 141 



Atmosphere, phenomena of the, 31 



Attraction of gravitation, 19 



Ayrshires, origin and characteristics of the, ...... 232, 233 



Barley, soils adapted to, 168, 169 



Barometer, use of the, 24, 26, 28 



26 



