INDEX 



363 



Soluble cotton, 69 

 Soluble oils, 'I'M) 

 Specific rotation, 52 

 Spectrum, 31 

 Sperm oil, 321 

 Starch, 21 

 animal, 319 



amount of, in crops, 63 

 commercial, how made, 67 

 digestion of, in intestines, 331 



in mouth. 328 

 formation of, from dextrose, 33 

 general description of, 63 

 grains acted on by diastase, 23 

 iodide, 66 



paste, 65 * 



Stassfurt potash deposits, 231 

 Steamed bone, 222 

 Steapsin, 331 

 Stearic acid, 74 

 Stearin, 75 



Stem and leaf crops, composition 

 of, 112 

 discussion of, 119 

 fertilizing constituents of, 



115 

 yields of, 113 

 Sterilization of milk, 346 

 Stick lac, 89 

 Stilton cheese, 349 

 Stone lime as fertilizer, 248 

 Strychnine, 99 

 Subsoil, 191 

 Succinic acid, 88 

 Sucrose, general description of, 56 



pure, how made, 60 

 Sucroxides, 60 



Sugar beet, sugar content of, 58 

 cane, sugar content of, 58 

 how made from sugar beets, 60 

 cane, 60 

 Sugars, 51 



Sulphate of potash, cause of soil 

 acidity, 244 

 as a fertilizer, 235 

 Sulphite process for making paper 



pulp, 70 

 Sulphur dioxide in air, 136 

 function in plant, 45 

 minerals in the soil, 169 

 Sulphuric acid, use with farm man- 

 ure, 266 

 Sumach leaves for tanning, 102 



Sunflower oil, 78 



Sun's rays, use of, in synthesizing 



plant, subst ances, 31 

 Superphosphate. See also Acid 



Phosphate, 225 



Tallow, 320 



Tankage, 217 

 Tannic acid, 101 

 Tannins, 101 

 Tartaric acid, 100 

 Temperature of air, 132 



for soil bacteria, 145 

 Tetracalcium phosphate in basic 



slag, 227 

 Theine, 97 

 Theobromine, 99 

 Therm, 339 

 Thomas slag, 227 

 Thymol in oil of thyme, 84 

 Timothy, changes in composition 



during growth, 125 

 Tobacco as an insecticide, 291 



waste, 238 

 Tolu, 91 

 Tracheae, 29 



Tricalcium phosphate, in bones, 

 309 

 in fertilizers, 221, 223, 227 

 in soils, 165 

 Trisilicic acids, 166 

 Trypsin, 331 

 Tubers, purpose of, 38 

 Two-cycle type of gas engine, _"»n 

 Tyrosine, 94 



Unavailable plant food, 26 

 Urea in farm manure, decomposi- 

 tion of, 261 

 Urine, 258 



Valoxia, 103 



Vegetable crops, composition of, 

 112 

 discussion of, 120 



