INDEX 



219 



Palisades in seed-coats, 71 

 Pedigree, 1 



Perfect cotton. See Ideal 

 Peruvian group of cottons, 6 

 Petals, 60 



cutting off, 67 

 Photographs, 136 

 Picker, mechanical, 155 

 Picking, daily, 89 

 Pickings, 93, 178 



short-period, 116, 120, 133 

 Pickle, 71 



obliterates pits, 78 

 Pigments of seed, 71 

 Pitch of convolutions of lint, 149 

 Pits in lint hair wall, 74, 78, 147 

 Plant, behaviour of, 162 



a machine, 21 



physiology, 173 

 Plant-development curves, 165 

 Plots, experimental, 158 

 Poisoning, 97 



by heat, 25 



self-, 99 

 Pollen, 15, 60 



prepotency of, 64 

 Pollen-tube, 62 

 Practical man, 178 



meaning of, 160 



and scientific methods com- 

 pared, 184, 193, 195 

 Primitive cotton, 3 

 Progress, 170 

 Protoplasm, 59, 140 

 Pulled cotton, 140 

 Pure forms, bred from crossing, 15 



lines. See Pure strains 



strain lint, 138 



spins better than 

 grader's estimate, 146 

 pollen, 62 

 properties of, 97 

 testing, 165 

 used, 58 



strains, 17, 106, 127, 143 

 characters of two, 20 

 formation of, 167 



Quality of lint, 103 

 of pickings, 116 



Rain storms, 162 

 Reaction capability, 42 



( Reasons for crop, 156 



; Records of crop condition, 163 



Register of seed, international, 169 

 : Regularity. See Uniformity 



of lint, inherited, 10 

 Renewal of seed, 17, 168 

 Research, conditions of, 124 



on crop, 156 



methods, 186 



Reversal of convolutions, 148 

 Rogues, detection of, 132 

 Romance of the trade, 154 

 Root, 93, 118, 121, 159 



importance of, 24 

 Root- interference, 34 

 Root, size of, 36, 38 



interference, 34 



size of, 36, 38 



and water, 28 

 Routine crop records, 171 

 Rule of thumb, 126, 153 



Salt, absorption by plant, 20, 39 



in cells, 20 

 Salted soil, 39 

 Sample, size of, 179 

 Sampling lint, difficulties of, 193 

 Scaffolding of the plant, 40 



rate of building, 46 

 Scatter of plots, 160 

 Schweitzer's reagent, 74 

 Science, as intermediary, 125 



opportunity of, 154 



and the trade, 153 

 Scientific methods, function of, 195 



and practical methods com- 



pared, 184, 193 

 Season's growth, 43 

 Seed, change of, 20 



classification by, 3 



and cultivation, relative im- 

 portance of, 133 



development of, 63 



fluctuation of hairs on, 193 



growth of, 68 



variation of lint on, 120 



number of hairs on, 107 



origin of, 59 



renewal, 17 



testing varieties, with small 

 amounts of, 165 



weight, 99 



method, 182 



