INDEX 



271 



Soil bacteria, 81, 200 



conditions, 5, 21 



cyanamide and, 106, 214 



fumigants, 249 



on limestone, 212 



packing, 6 



structure, 2 



texture, 5 



water retaining power of, 6, 207 

 Soluble copper sulphate, 240 



fertilizers, use of, 208 



glass, 139, 141, 246 



phosphate unit price, 195 



salts, 161 

 Solution, 161 



Somerville, 212, 214, 222, 223, 258 

 Somme phosphates, 30, 144 



superphosphates, 144 

 Sommer, 60 

 Soot, 57 

 Sorrel, 212 

 Sour soils, 211 



Sources of fertilizers, 22, 224 

 South American phosphates, 34 

 South Downs farming, 200, 201 

 Southern France, wheat in, 200 

 Spade work, 9, 197 

 Spanish phosphates, 32 



potash, 41 



Specific gravity of acid used in making 

 superphosphate, 139, 141, 144 



gravity of sulphuric acid, 132 

 Spent iron oxide, 86, 128 

 Spores, destruction of fungoid, 260 

 Sprays, 240, 254 



sulphuric acid, 135 

 Spurry, 212 

 Standard sieves, 39 

 Starch production, 20 

 Stassfurt potash, 40 

 Stasfurth, 172 

 Steam, use of, in leaden chambers, 



129 

 Steamed bone flour, 173, 177, 185, 217 



leather, 115 

 Steel ball mill, 137, 174 



manufacture, 63 

 Stickiness of superphosphates cured, 



150, 181 

 Stimulating manures, use of, 9, 203, 



212 



Stomata, 3 



Stone acid mixer, 138 

 Stoplasa, 178 

 Stoppani, 156 

 Storage of fertilizers, 196 

 Storer, 258 



Straw as a nitrogen fixer, 80 

 manures for, 21 



Strength of acid on superphosphate, 



effect of, 138, 143, 174 

 Sugar production, 3, 20 

 Suint, 75 



Sulphates on plants, influence of, 170 

 Sulphate of ammonia, 83, 179, 185, 

 187, 189, 203, 225 



of ammonia, coloured, 87 



of ammonia, composition of, 88 



of ammonia for hot climates, 213 



of ammonia, neutral, 88 



of ammonia on light soils, 208 



of ammonia, use of, 6, 10, 11, 204, 



216 

 Sulphate of lime, 45, 47, 145, 153 



of potash, 168, 170, 206, 231 



of soda, use of, 21, 171, 213 

 Sulphates of copper and iron, 240 

 Sulphides in ammonia liquor, 85 

 Sulphide sprays and washes, 246, 248 

 Sulphites in gas lime, 55 

 Sulphocyanides in ammonia, 85 



in ammonium sulphate, 87 

 Sulphonated creosote, 253 

 Sulphur catalyst, 92 



dioxide, 128, 129 



dioxide and ammonia, 92 

 Sulphuric acid, 70, 128, 159, 169, 

 171, 174 



acid, amount produced, 133 



acid for fertilizers, 132 



acid manufacture, 128 



acid on superphosphate, effect of 

 excess of, 144 



acid recovery, 86 



acid, use for weed killing, 135 



acid, use of, 84 



acid used in sulphate of ammonia, 



133 

 Sulphur in coal, 59 



in zinc ores, 134 



kilns, 129 



liver of, 247 



recovery, 67, 86 



sprays and washes, 246, 248 



supply of, to plant, 6, 170 

 Superphosphate, 46, 127, 130, 159, 

 174, 176,178,184,187,193, 203 



amounts applied, 130 



amounts produced, 130 



defective, 142 



dens, 141 



effect of hot acid on, 144 



fumes from, 141 



industry, 229 



moisture in, 143, 196 



on chalk soils, 209 



reversion of, 154, 182 



sulphuric acid for, 129 



