INDEX. 



151 



Potash .... 



salts . . . 

 Potato, cells of . 

 Prepared fertilizers 

 Pressure of the ;iir 

 Protein .... 



Paoe 



23, 8-i, 85 



85 



(ill 



85, 80 



. U 



118, ll'J 



Quartz rock 22 



Quicklime 13, 86 



Radicle, the 59, 62, 63 



Rain 42. 45, 46, 47 



Rainless regions 47 



Rain water, a fertilizer ... 108 



Ratio, nutritive 125 



Ration, balanced 125 



Rations, how made up . . . . 127 



examples of 128,129 



Requirements of animals . . . 127 



Respiration 20 



Rice plants 101 



Rochelle powders 13 



Rocks, ancient 30 



Rolling land 107 



Rootlets G4 



Roots G3, G4 



air necessar}' fcr .... 101 



in wet soil 108 



of buttercups G3 



of clover 64 



of the maple 03 



tap 03 



tuberous 63 



Rotation of crops .... 1 10-1 12 



Ruminants 134-136 



stomachs of 134, 135 



Running water, cf'cct cf . . . 31 

 " Run out " land 79 



Saliva I.33 



Salivarj' glands 1,3:3 



Salt 11, 12, 17, 65, 87 



Saltpeter 84 



Sandstone , , » , , , 22, 31 32 



Page 



Sandy soil 37. 38, 105 



Sap of plants 65 



flow of 71,72 



Saturated soil 101 



Sea breezes , 45 



Seeds 54 



unripe 55 



Selection of food by plants . . 73 



Sepals 74 



Shallow cultivation 107 



Silicates 22 



Silicon 22, 73 



Silicic acid 13 



Simple substances 7 



Slag 85 



Slaked lime 12 



Smoked glass 21 



Smut 60 



Snow 47 



crystals . 17 



Sodium 1.3, 23 



Soil, formation of .... 27, 30 



alluvial 105 



composition of . . . 30, 35, 78 



fertile . 77 



from granite 79 



from limestone 79 



sandy 37, 38, 105 



warmth of 110 



Solids, liquids, and gases ... 16 

 South Carolina rock .... 85 

 Squashes, mixture of ... . 74 



Stamens 74 



Starch CO 



of potatoes 69 



Stomach, tl:e 133, 134 



Stomachs of ruminants . . . 135 



Stomata 60, 61 



Storms CO 



Subsoil 104 



plowing 105 



Substances, simple 7 



Success in agriculture . . . . 141 



Sugar 10, 60 



Sulphates 13, 84 



Sulphate of ammonia .... 84 



of lime 13 



of potash 2 ) 



Sulphur 22 



Sulphuric acid . . 10, 13, 21, 22, GO 



