INDEX 



195 



Germination, 15 

 over-heating prejudicial to, 25 

 rate of, 16 

 strength of, 123 

 Gibson, 176 



Ginning out-turn, fluctuation in, 101 

 correlated with strength, 86 

 the, 86 

 Glands, of boll, 141 

 Glass plate, graduated, for leaf-form, 



96 

 Grading expert, 82 

 difficulties of, HI 

 Green lint, of " Texas" wool, 102 

 Growth, accelerated by leaf-removal, 28 

 afi'ected by clouds, 28 

 affected by humidity of air, 28 

 affected by night temperature, 30 

 and temperature, 20 



summary, 26 

 cessation of, 58 



cessation of, affecting flowering, 61 

 daily, 59 



effect of soil on, 54 

 follows chemico-physical laws, 21 

 intercalary of lint, 83 

 limited by root-size, 35 

 methods of recording, 55 

 not controlled by night-temperature, 



60 

 of flowering branches, 63 

 of leaf, 96 

 of pollen-tube, 124 

 of stem, insignificant effect of day- 

 temperatures, 29 

 rarely limited by photosynthesis, 51 

 record, daily, 16, 17, 30 

 slower in secondary roots, 33 

 slowing of, 60 

 Growth-acceleration by temperature, 



21, 25 

 Growth-cessation, affecting leaf -size,156 

 correlation with seed-weight, 170 

 inheritance of, 151 

 Growth curve, 58 



fluctuation in, 94 

 Growth-rate, affecting first-flower date, 

 52 

 inheritance of, 151, 153 

 of root, 37 



Haibs. See Hirsuteness, 140 

 Hamouli, 5 



Hanging-drop chamber, special, 20 

 Heat-poisoning. See Thermotoxy 

 Height, unaffected by branching, 152 

 change of fluctuation with age, 93 

 correlated with seed-weight, 101 

 correlation with first flower, 52 

 factors composing, 151 

 fluctuation, correlated with other 

 characters, 94 



Height, fluctuation in, 93 



heterozygous selected family, 109 



inheritance of, 150 



measurement with water-level, 93 



new forms bred, 154 



of seedling, 31 

 Helianlhus, shows sunshine effect, 28 

 Henry, Yves, 81 

 Heredity of flower-form, applied, 119 



general, 127 



human, 132 



nature of results about, 129 

 Herodotus, 1 



Heterogeneity of commercial varieties, 

 106 



of Hindi, 5 

 Heterozygous origin of a selection, 108 



plant, selection of, 109 

 Hindi, natural crossing with Egyptian, 



identification by leaf-spot, 133 



origin of, 5 



self-coloured petal, 138 



weed-cotton, 106 

 Hirsuteness, 140 



of Hindi, 106 

 History, 1 

 Holton, 140, 141 

 Hughes, 71, 86, 88 

 Human heredity, 132 

 Humidity of air, effect on growth, 28 



effect on leaf-temperature, 48 



of soil, 36, 38 

 Hybridisation, natural. See Natural 



crossing 

 Hybrids investigated, 127, 130 

 Hypocotyl, length of, 31 



stomata of, 39 



Idiosyncrasies of the plant, 31 

 Illumination, 51 



Immune strains, from vicinism, 125 

 Immunity of style to pollen, 121 

 Impurity of varieties, cause of, 110 



universal, 111 

 Indian cottons, impurity of varieties 



in. 111 

 Individual, record of date for, 132 

 Infiltration, effects of, 60 

 Inheritance, complexity affected by 

 systematic relation, 149 



See Heredity. 

 Insect pests, 88 



Insulation from heat by dry soil, 15 

 Inter-oellular spaces, 38 

 Interference of roots, 35 

 Interiiode, first, specific length of, 32 



length of, 58 



length, inheritance of, 150 

 Interval between plants not sole 



factor in vicinism, 120 

 Involucral bract, form, inheritance of, 160 



bracts, fluctuation in, 97 



o 2 



