196 



INDEX 



Irregularity of lint length, 83 

 Irrigation, difficulty of adjusting, 54 



affecting shedding, 70 



affecting stomata, 41 



causing modes in growth curve, 60 



effect on soil water, 76 



effect on water-table, 176 



of various soils, 71 



relation of soil-research to, 180 



restriction of, 178 



work wanted on soil-moisture, 77, 180 

 Isolation of varieties, 110 



Jannovitz. See Yannovitch 



Joly balance, for transpiration, 45 



Jumel, 2, 3 



Jumel cotton, re-appearance in Fj, 148 



" Khamsin " weather, 29 

 Kinds of cotton, grown on breeding- 

 plot, 123 



Lamina, plication of, 96 

 Leaf, age of, 40 



age affecting temperature, 47 

 Leaf-area, high in wide-sowing, 44 

 Leaf, area of twelve first, 47 

 colour, inherited, 133 

 development of, 96 

 fluctuation in, 95 

 form, inheritance of, 156 

 form of, 95 



increase in dry- weight of, 50 

 length, correlated with seed-weight, 

 100 

 fluctuation correlated with height, 

 94 

 new forms bred, 159 

 shedding of, 67, 69 

 spot of, 133 

 symmetry of, 50 

 variation in temperature of, 47 

 Leaves, removal inducing growth, 28 

 effect of removal on photosynthesis, 



29 

 stomata of, 39 

 Leake, 62, 93, 113, 120, 136, 152, 156 

 Ledger, 132 



page of, 94 

 Length of floral organs, inheritance of, 

 169 

 of leaf, fluctuation in, 95 

 inheritance of, 156 

 ' ' Length " of lint, commercial, 87 

 period of determination, 83 

 examining development, 82 

 inheritance of, 173 

 irregularity in, 83 

 See Lint-length 

 Length of sinus of leaf, inheritance of, 



158 

 Levant, modern Asiatic cotton in, 3 

 Life of a variety, 112 



Life-story, beginning of, 6 

 Light, effect on stomata, 41 

 Limitation of root, 44 



raises ginning out-turn, 101 

 Line, pure, 89 

 Linin, 8 

 Lint, abnormally long, 104 



colour, related to fuzz colour, 102 



colour, inheritance of, 146 



correlated with seed weight, 101 



cytology of, 82 



depreciated by fog, 44 



development of, 81 



distribution on seed, inheritance of. 

 145 



nature of differences in, 147 



new, bred true, 173 



phylogeny of, 102 



research desirable on, 180 



strength of, 84 



"style," inheritance of, 147 



superfine in Fj, 147 



the only distinction between "vari- 

 eties," 108 



twist of, 84 

 Lint-length, irregular, of commercial 

 varieties, 107 



fluctuation in, 102 



inheritance of, 173 

 Lint-weight, fluctuation in, 101 



correlated with seed-weight, 86, 101 



correlated with strength, 85 

 Linum, 136 

 Loouli of ovary, determinants of, 166 



affecting width, 163 



fluctuation in, 99 



inheritance of, 163 



new forms bred, 165 

 Lucas, 177 



Maho Bey, 3 

 Man, heredity in, 132 

 Manufacture of cotton plants, 179 

 Manufacture, specialisation of, 178 

 Manures, 88 



affecting out-turn, 86 

 Marshall Ward, 121 

 Massed data, the fourth grade of 



heredity evidence, 130 

 Matching of colours, 92 

 Maternal determination of embryo- 

 weight, 180 

 Matthaei, 47 

 Maturation of boll, 66 



interval, fluctuation in, 98 



sub-division of, 83 

 Mediseval period, 2 

 Mendelian evidence, summary of four 



classes, 130 

 Mendel's Law, in cotton, 132 



misinterpretation of, 145 

 Meristic character, inheritance of, 163 

 Mesophyll, 41 



