132 



INDEX. 



Bones, dust of, 62 Durability of, 68 Gelatine 



in, 68 Use in compost, 72. 

 Bouquet of wines, 105. 

 Boracic acid, 41. 



Botanists, neglect of chemistry by, 20. 

 Brandy, from corn, 105 Oil of, 105. 

 Brazil, wheat in, 52. 

 Brown coal, 113. 

 Buckwheat, ashes of, 54. 

 Bulbs, how nourished, 27. 



C. 



Calcareous spar, 90. 



Calpium, fluoride of, 53 Chloride of, 64. 



Calculous disorders, 26. 



Calico printing, use of cow-dung in, 63. 



Caoutchouc, in plants, 27. 



Carbon, 10 Afforded to the soil by plants, 27 

 Assimilation of, 12-23 Combination of, with 

 Oxygen, 10 Of decaying substances seldom 

 affected by oxygen, 111 Derived from air, 16 

 In decaying wood, 1 1 1 In decaying woody 

 fibre, 111 In sea-water, 16 Oxide of, formed, 

 92 Quantity in grain, 14 in land, 14 in 

 straw, 14 Restored to the soil, 27 Received 

 by leaves, 16 Its affinity for oxygen, 100. 



Carbonate of ammonia decomposed by gypsum, 

 34 Of lime in caverns and vaults, 43. 



Carbonic acid in the atmosphere, 11 Changes 

 in the leaves, 48 Decomposed by plants, 16 

 Emission of, at night, 18 Evaporation of, 20 

 Evolution from decaying bodies, 100 From 

 decaying plants, 29 excrements, 34 humus, 

 23 respiration, 25 springs, 29 woody fibre, 

 23 Increase of, prevented, 16 Influence of 

 light on its decomposition, 19. 



Carburetted hydrogen with coal, 115. 



Caverns, stalactites in, 43. 



Charcoal condenses ammonia, 35 Experiments 

 of Lukas on, 84 May replace humus, 27 

 Theory of its action, 27 Promotes growth of 

 plants, 84. 



Chemical effects of light, 48 Forces can replace 

 the vital principle, 26 Processes in nutrition 

 of vegetables, 9 Transformations, 25, 87. 



Chemistry, definition of, 9 Organic, what is, 9 

 Neglected by botanists, 20 ; and physiolo- 

 gists, 20. 



China, its agriculture, 65 Collection and use of 

 manure in, 65. 



Chloride of calcium, 64 Of nitrogen, 88 Of 

 potassium, its effect, 39 Of sodium, its vola- 

 tility, 42. 



Clay, burned, advantages of, as a manure, 35. 



Clays, potash in, 50. 



Clay slate, 53. 



Coal, formation of, 113 Inflammable gases from, 

 1 1 5 Origin of substances in, 1 12 Of humus, 

 12, 44 Wood or brown, 113. 



Colours of flowers, 33. 



Combustion at low temperatures, 100 Of de- 

 cayed wood, 112 Induction of, 102 Re- 

 moves oxygen, 16 Spontaneous, 94. 



Compost manure, 72. 



Concretions from horses, 53. 



Constituents of plants, 10. 



Contagions, reproduction of, on what dependent, 



121 Susceptibility to, how occasioned, 125. 

 Contagions, how produced, 121 Propagation of, 



124. 

 Contagious matters, action of, 124, 122, 129 



Their effects explained, 121 Life in, disproved 



121 Reproduction of, 121. 

 Copper alloy, its action, on sulphuric acid, 88. 

 3orn, how cultivated in Italy, 52 Phosphate of 



magnesia in, 53. 

 3orn brandy, 105. 

 Corrosive sublimate, action of, 118. 

 3ow, excrements of the, 41, 59, 60 Variable in 



value, 60 Urine of the, 60 ; rich in potash, 



41. 



Cow-pox, action of virus of, 127. 

 Urops, rotation of, 54 Favorable effects of, 55 



Principles regulating, 59. 

 Cultivation, its benefits, 17 Different methods of, 



49_Object of, 49. 

 Culture, art of, 43 Of plants, principles of the, 



49. 



Cyanic acid, transformation of, 94. 

 Cyanogen, combustion of, 102 Transformation 



of, 94. 



D. 



Davis, his account of Chinese manure, 65. 



Death from nutritious substances, 21 The source 

 of life, 36. 



Decandolle, his theory of excretion, 55 Dif- 

 ference of his views and those of Macaire- 

 Princep, 56. 



Decay, 98 A source of ammonia, 30 Of wood, 

 109 Of plants restores oxygen, 29 and pu- 

 trefaction, 88. 



Decomposition, 24, 87 Organic, chemical, 88. 



Dextrine, 21. 



Diamond, its origin, 112. 



Diastase, 46 Contains nitrogen, 46. 



Disease, how excited, 120. 



Dog, excrement of the, 59. 



Dung hills, liquid from, 64 Reservoirs, 64. 



E. 



Ebony wood, oxygen and hydrogen in, 19. 



Effete matters separated, 24. 



Elements of plants, 10 Not generated by or- 

 gans, 21. 



Elphinstone, Sir Howard, on soda-ash, as a ma- 

 nure, 69. 



Equilibrium of attractions disturbed, 92. 



Equisetacse contain silica, 58. 



Eremacausis, 98 Analogous to putrefaction, 130 

 Arrested, 98 Definition of, 98 Necessary 

 to nitrification, 102 Of bodies containing ni- 

 trogen, 102 Of bodies destitute of nitrogen, 

 100. 



Ether, oenanthic, 105. 



Excrementitious matter, production of, illus- 

 trated, 25. 



Excrement, animal, its chemical nature, 59 Of 

 the dog, cow, &c., 59 Influence of, as ma- 

 nure, 61. 



Excrements of plants, 55 Conversion of, inta 

 humus, 13 Of man, amount of, 65 Value of, 

 63 Propagation of, 65. 



Excretion, organs of, 25 Of plants, theory of, 55. 



Experiments in physiology, object of, 20 Of 

 physiologists not satisfactory, 22. 



F. 



Fallow, changes from, 52 Crops, 54 Time, 54. 

 Fattening of animals, 49. 

 Faeces, analysis of, 60. 

 Ferment, 95, 103. 



