Index. 



333 



Rotation of crops, 203. 

 Ruminants, digestion by, 231. 

 Rye, 182. 



Salicylic acid, 279. 

 Saliva, 219. 

 Salt, common, 163. 

 Sand, properties of, 45. 

 Schweinfurth's green, 295. 

 Sea water, 77. 



Season, influence on plant compo- 

 sition, 198. 



Seeds, germination, 79. 

 Sedimentary rocks, 35. 

 Separated milk, 282. 

 Sewage as manure, 75. 

 Shales, 38. 

 Sheep, nutritive ratio for, 262. 



digestion of foods, 231. 



manure, 113. 



production of wool, 261. 

 Silage, corn, 192. 



clover, 192. 

 Silicon, function in plants, 108. 



occurrence, 15. 

 Silicates in soil, 37. 

 Size of animal, influence on ration, 



254. 



Skimmed milk, 282. 

 Soap, action on hard water, 70. 



nature of, 97. 

 Sodium, occurrence, 13. 

 Softening of hard water, 71. 

 Soils, composition of, 61. 



definition of, ,35. 



fixation of nitrogen in, 44. 



formation, 40. 



gases in, 60. 



retention by, 55. 

 Soil, sedentary and transported, 39. 



relation to heat, 48. 



relation to water, 52. 



tenacity of, 50. 



water in, 50. 



weight per acre, 61. 

 Sorghum, 191. 

 Specific heat, 48. 

 Spontaneous combustion, 96. 

 Starch, in plants, 91. 



influence on digestion, 233. 



part in nutrition, 217. 



productive value, 240. 

 Steapsin, 223. 

 Stems of plants, 83. 

 Stearin, 96. 

 Sterilization, 279. 

 Stomata of plants, 85. 

 Stomach, digestion in, 220. 

 Straw as litter, 118. 



energy consumed in digestion 



of, 240. 

 Sucrose, 90. 

 Sugar beets, 194. 

 Sugars, 90. 

 Suint, 262. 



Sulphate of ammonia, 149. 

 Sulphur, function in plants, 107. 



occurrence, 11. 

 Sulphur and lime wash, 302. 



dioxide, 34. 

 Sunflower, 190. 

 Super-phosphates, 154. 

 Swede/crop, 194. 

 Sweet corn, 202. 



Temperature of soils, 50. 



Terpenes, 98. 



Therms, 237. 



Thomas slag, 157. 



Tillage, 63. 



Timber, composition of, 179. 



Tobacco, 196. 



Transpiration from leaves, 81. 



Trees, food requirements, 195. 



