INDEX. 



133 



Fermentation, 103 Of Bavarian beer, 107 Of 



heer^ 10? Gay-Lussac's experiments in, 101 



Of sugar, 95 Of vegetable juices, 95 



Vinous, 103 Of wort, 104. 

 Fertility of fields, how preserved, 61. 

 Fires, plants on localities of, 52. 

 Fir-wood, analysis of its ashes, 38. 

 Fishes in salt-pans, 41. 

 Flanders, manure in, 65. 

 Fleabane, 54. 



Flesh, effect of salt on, 116. 

 Flour, bran of, 62. 



Flowers, colours due to ammonia, 33. 

 Fluorine in ancient bones, 53. 

 Food, effects on products of plants, 47 Of young 



plants, 45 Transformation and assimilation 



of, 25. 



Formation of wood, 47. 

 Formic acid, theory of its formation, 25 From 



hydrocyanic acid, 25. 

 Fossil resin, origin of, 112. 

 Franconia, caverns in, 43. 

 Fruit, increased, 45 Ripening of, 29 Changes 



attending, 45. 

 Fulminating silver, 88. 



G. 



Gaseous substances in the lungs, effect of, 126. 



3asterosteus aculeatus, in salt-pans, 41. 



Gay-Lussac, his experiments, 101. 



Germany, cultivation in, 61. 



Germination of potatoes, 45 Of grain, 46. 



Glass as a manure, 63. 



Glue, manure from, 62. 



Gluten, conversion of, into yeast, 106-110 



Decomposition of, 98 Gas from, 103. 

 orrain, germination of, 46 Manure for, 40 Rust 



in, 75. 



Granitic soil affords alkalies, 40. 

 Grapes, fermentation of, 103- Juice of, differences 



in, 106 Potash in, 38. 

 Grasses, seeds of, follow man, 41 Silica in, 58 



Valued in Germany, 57. 

 Grauwacke, soil from, 50. 

 Growth of plants, conditions for the, 49. 

 Guano, 67. 

 Gypsum, decomposition of, 34 84 Its influence, 



34__Use of, 64. 



H. 



Hay, carbon in, 14 Contains nitrogen, 59 

 Silica, 53. 



Haystack, effect of lightning upon a, 53. 



Hessian and English weights and measures, 130. 



Hibernating animals, 45. 



Horse, urine of the, 35 Concretions in the, 53. 



Horse dung, action of water upon, 60 Analysis 

 of, 60. 



Human faces, analysis of, 60. 



Humate of lime, quantity received by plants, 13. 



Humic acid, 12, 31 Action of, 44 Properties 

 of, 13 Is not contained in soils, 31 Quantity 

 received by plants, 14 Insolubility of, 44. 



Humus, 11 Action of, 23 Analysis of, 12 

 Erroneous opinions concerning, 17 Action 

 upon oxygen, 43 Coal of, 44 Conversion of 

 woody fibre into, 110 How produced, 110 

 Its insolubility, 43 Properties of, 13 Re- 

 placed by charcoal, 27 -Source of carbonic 

 acid, 23 Theory of its action, 23 Unneces- 

 sary for plants, 27. 



Hydrocyanic acid, 23, 88. 



Hydrogen, assimilation of, 28, 29 Properties of. 

 10 Excess of, in wood accounted for, 28 

 Of decayed wood, 1 1 1 Of plants, source of, 

 28 Peroxide of, 89. 



Hyett, Mr., on nitrate of soda, 69. 



Ice, bubbles of gas in, 20. 



Indifferent substances, 11. 



Ingenhouss, his experiments, 18. 



Inorganic compounds, 91 Action of, 115- In 



what they differ from organic, 91. 

 Inorganic constituents of plants, 36-43. 

 Iron, oxide of, attracts ammonia, 35. 

 Irrigation of meadows, effect of, 43-57. 



Lactic acid, production of, 98. 



Lava, soil from, 51. 



Lead, salts of, compounds with organic matter, 118. 



Leaves, absorb carbonic acid, 16 Ashes of, con- 

 tain alkalies, 52 Cessation of their functions, 

 24 Change colour from absorption of oxygen, 

 24 Consequence of the production of their 

 green principle, 58 Decompose carbonic acid, 

 48 Their office, 46 Power of absorbing nu- 

 triment, how increased, 24 Quantity of car- 

 bon received by, 16 Contain azotised matter, 

 63. 



Lentils, analysis of, 54. 



Life, notion of, 121. 



Light, absence of, its effect, 18 Chemical effects 

 of, 48 Influences decomposition of carbonic 

 acid, 19. 



Lime, phosphate of, 62, 71. 



Lucerne, phosphate of lime in, 54 Benefits at- 

 tending its culture, 58. 



M. 



Macaire-Princep, his experiments, 55. 



Magnesia, phosphate of, in seeds, 22. 



Manure, 59-70 Animal, yields ammonia, 33 

 Artificial, 69-71 Carbonic acid from, 34 

 Components of, should be known, 49 Of the 

 Chinese, 65 Effect of, 59 Bone, 62. 



Maple juice, ammonia from, 33 Trees, pugar 

 of, 33. 



Meadows, irrigation of, 43 57. 



Medicine, action of, remedies in, 62. 



Mellitic acid. 112. 



Metallic compounds required by plants, 21. 



Metamorphosis, 88. 



Miasm, defined, 127. 



Minerals attract ammonia, 35. 



Morbid poisons, 121. 



Motion, its influence on chemical forces, 89. 



Mould, vegetable, 112 Conversion of woody 

 fibre into, 112. 



Mouldering of bodies, 113. 



Must, fermentation of, 104. 



N. 



Naples, soils of, 52. 

 Night-soil, 65. 

 Nile, soil of its vicinity, 57. 

 Nitrate of soda, as a manure, 69. 

 Nitric acid from ammonia, 103 animals, 30 



How formed, 102. 



Nitrification, 102 Condition for, 103. 

 Nitrogen from animals, 30 Account of, 10- 



M 



