218 



THE DEVELOPMENT OF EAW COTTON 



Knowledge of cotton crop very un- 

 certain, 159 



Labour difficulties, 34, 154 



native, 17 



Lancashire and Egypt, 125 

 Lateral roots, 36 

 Leaf, form of, 4 



function of, 31 

 Leaf -form, inherited, 137 

 Leake, H. M., 18, 43, 102, 159 

 Length of lint, 74, 113, 140 

 combed, 184 

 determination of, 76 

 development of, 76, 

 inheritance of, 10 

 to order, 76 

 single hairs, 183 

 variability of, 89 

 and yield, 40 

 Lester, J. H., 191 

 Light, refraction by lint, 138 

 Limitations of book, 55 

 Limiting factors, 26, 55, 115 

 Lint, collapse of hair, 142 

 colour, 138 



deterioration, 136 

 commercial, 137 

 convolutions of, 148 

 cuticle of, 75, 139 

 density on seed, 82 

 development of, 73 

 diameter of, 106 

 method, 186 

 difficulty of cutting sections, 



175 



elasticity, 138 

 evolution, 6 

 fineness of, 107, 143 

 length, 113, 140 



study of, 182 

 lustre of, 139 

 origin of, 102 

 various properties independent, 



94 



slipperiness of, 145 

 strength, 94, 115, 141 

 graders, 144 

 of hair unimportant in 



yarn, 146 



thickness of wall affects con- 

 volutions, 149 

 iitility to plant, 7 



Lint, weight method, 187 

 per seed, 100 

 of single hairs, 105 



Lintless cottons, 10 



Lloyd, Professor, 28 



Lustre of lint, 139 



McConnel, J. W., 170 



Manures, 39, 157 



Material used for lint studies, 58 



Matthews, J. M., 57 



Maturation of boll, 65, 73, 88, 114, 



173 

 Maturity, arrival at, 43 



hastening, 113 

 Means, five-day, 196 

 Mendel's law, 9 



Methods of field experiments, 160 

 of investigation, 54, 155, 171 

 Micro-balance, 188 

 Microscopic structure, 55 

 Microscopy, 174 

 Mill-hand, 153 

 Mixing of pickings, 120 

 Modifying factors, 49 

 Monie, H., 56 

 Mutation, 14 



Names, 1 



Natural habitat of cotton, 8 



selection, 129 



Nature, interference with, 168 

 No. 77, pure strain, 58, 88, 173 

 Nuclei, 59 

 Nucleus of lint, 74 

 Nutritive effects not inherited, 

 12 



Observation of crop, 163, 171 



rows, 166 

 Observer, 161, 178 

 Oil of seed, 140 

 Old cotton, 170 

 O'Neill, C., 170, 183, 186, 188 

 Opinions, accepted, 94, 101 



misleading, 162 

 Optimum conditions, 157 ^ 

 Origin of species, 14 

 Origination of varieties, 11 

 Out-turn. See Ginning out-turn 

 Ovary becomes boll, 59 

 Overheating of the plant, 25 

 Ovules become seeds, 59 



