CONTENTS. VII 



PAGE 



Poudrette and guano as manures, 58 



Prevention of the loss of ammonia from manures, .... 61' 



Productions of the soil, their use, 78 



Phosphate of lime essential in the food of animals, ... 81 



Phosphoric acid, how formed, (A. 14) . . 91 



Quantity of bone-earth in ten gallons of milk, . ... 56 

 Quick-lime should not be mixed with guano or manures 



containing ammonia, 65 



Quick or caustic lime, 73 



Quick-lime changed to the mild carbonate by exposure to 



the atmospheric air, 73 



Quantity of starch, or its equivalent, man must daily con- 

 sume, to maintain health, 79 



Relative amount of carbon in flesh and starch, . (A. 40) . 105 



Source of the subsistence of animal life, 13 



Substances found in the inorganic part of plants, .... 19 



Soda, 20 



Silicia, 24 



Sulphuric acid, 24 



Substances in the structure of plants, 30 



Starch, 30 



Sources of carbonic acid gas, 32 



Substances of which soil is formed, 35 



Sources from whence the organic part of soil is obtained, 36 



Soil, how exhausted, 37 



Soil supplied with organic matter, 37 



Sources of the inorganic part of the soil, 38 



Sources of the inorganic food of plants, 42 



Sulphate of soda, 68 



Salines as manures improved by mixture, 70 



Slaked lime, . . . 70 



Solution, (A. 22) .. 94 



Symbols and equivalents of elementary bodies referred to 



in this work, (A. 35) . . 101 



Table of the ashes of grasses, .43 



