252 INDEX 



PAGE 



Pigments, white Chinese 227 



lithophonc 227 



barytes 227 



green, Brunswick 227 



chrome 227 



blue, ultramarine 228 



Prussian 228 



red, lead ' 228 



iron 228 



vermilion 228 



yellow, chrome 228 



chromate, lead 228 



ochres 228 



brown, umbers 228 



Vandyke 228 



black, lampblack 228 



Plant food, availability of 48 



source of 70 



forms of 152 



measuring requirements 152 



field tests 158 



Plant leaves, functions of . 73 



leachings from 74 



food, gain and loss of 82 



Plants, root systems of 70 



Potassium 39 



Potash, salts, occurrence 137 



organic sources 140 



minor sources 140 



wood ashes as source of 140 



commercial salts 143 



Proteins 174 



Radicals 17 



Rations 179 



growth 179 



maintenance 180 



fattening 181 



milk-cows 182 



work animals 182 



calculations of 194 



Salts 26 



Shellac 231 



Soil components 59 



