INDEX 



193 



Correlation of seed-weight with other 

 characters, 101 



causing autogenous fluctuation, 

 129 



irresolvable, 129 



of boll width and loculi, 163 



of growth-rate and height, 153 



of lint-length and seed- weight, 173 



of seed- weight with other characters, 

 170 



possible of growth, and composition 

 of pollen, 124 



-diagram test, for segregation, 159 

 Cotton fibre. Hee Lint 



Mendel's Law applicable to, 132 



worm, effect on flowering, 98 



worm, efifect of mild attack, 88 

 Cotyledons, stomata of, 39 

 Coupling, gametic, in petal spot, 



139 

 Craig, 45, 86, 129 

 Critical date for sowing, 53 



period, the, 54, 65 



period, overlapped by next, 79 

 Crop, arrival of. See Arrival 



of 1903, high ginning out-turn, 

 86. 



of 1909, 54, 64, 79 



of 1910, early, 53 



of 1911, late, 53 

 Crops, short, effect on price, 178 



variation in, 180 

 Crosses. See Hybrids 

 Crossing, of reputed species, 127 

 Cryptomeres, in fuzz-inheritance, 143 

 Cultivation, general, relation of research 



to, 180 

 Cuticle of lint, 82 



for extra length of lint, 104 

 Cytology of lint, 82 



Daily growth, 59 



Damping-off fungi, 18 



Darkness, effect on stomata, 40 



Darwin, F., 40 



Date of sowing. See Sowing date 



Death-point, 24 



Death of roots, 38 



of root through asphyxiation, 79 

 Density of lint, 82 



Desiccation of soil causing higher 

 tissue-temperature, 50 



effect on stomata, 41 



local, of soil near roots, 43 

 Deterioration of varieties, 5 



of commercial varieties, 112 



of Egyptian yield, 176 

 Determination, maternal, of seed- 

 weight, 100 

 Development of flower, 97 



of leaf, 96 



of root-system, 33 



of stomata, 40 



stages in, 14, 54 



Differentiation of gametes, 125 



of ovary-loculi, 99, 166 

 Disastrous effect of early flood, 54 

 Diseases, fungoid and insect, 88 



fungoid, 17, 19, 88 

 Dissection of curves, method, 129 



of frequency, polygon, 168 

 Distribution of lint on seed, inheritance 



of, 145 

 Double fertilisation, 12 

 Drainage, development of, 178 



relation of soil temperature to, 37 

 Dryness, physiological, 42 

 Dry-weight, increase through photo- 

 synthesis, 50 

 Dust-storms, 29 



Earias insulana. See Boll- worm 

 Early maturity, example of, 109 



complex inheritance of, 179 



sowing, probably over-done, 53 

 Economics, summary of, 175 



See Todd 

 Egyptian, Ancient, method of illumin- 

 ation, 79 



hypocotyl shorter than in Upland 

 (King), 32 



inter-, only one artificial hybrid in- 

 investigated, 130 

 Embryo, development of, 12 



sac, 116 

 Embryos, mixed, in some ovary, 116 

 Embryonic tissue, of root-tip, 32 



weight maternal, 100 

 England, growth of cotton in, 32 

 Environment, 14, 16, 17, 27, 46, &c. 



affecting leaf form, 96 



effect on fluctuation in flower, 97 

 Equilibrium of root and shoot, 70, 95 



of water supply and loss, 28 

 Error, curve of, simulated by segrega- 

 tion, 128 



of observation, standardised, 191 



probable, q.v. 

 Errors, accumulation of, 99 

 Evaporation. See Critical period 

 Evidence on heredity, four classes, 130 

 Evolution of fuzz, 145 

 Exhaustion of food, not the cause of 



" staling," 22 

 Experiments, useless, 56 

 Expert. See Grading expert 

 External appearance of "Varieties," 



106 

 Extinct varieties, 4, 105 



Factors, constituting fuzz, 144 

 controlling loculi of ovary, 166 

 of stem-height, 151 

 Failure of seed-supply, unless con- 

 tinuous, 178 

 Fallacies of correlation methods, 129 

 Fallacy, principal, of selection- 

 methods, 123 







