1 9 2 



INDEX 



Boiling curve, effect of shedding, 72 



fluctuation in, 98 

 Bolls, ratio to flowers, 65 



number of, probable error, 57 

 Bracts, involucral, fluctuation in, 97 

 Branch, flowering, initiation of, 95 

 Branches, correlation of growth-rates 

 till June, 53 



delayed formation of flowering, 52 



flowering, growth of, 63 



lateral, growth expressed in flower- 

 ing-curve, 62 



Branching, affecting first-rate flower 

 date, 52 



affecting seed- weight, 170 



effect on flowering curve, 62 



effect on height. 152 



fluctuation in, 93 



free, of isolated plants, 44 

 "Bread and cheese" spinning, 105 

 Breaking-strains, 81 

 Breeding, essential feature of, 118 



plot, the, 120 



problems of, 178 

 Bud, action of environment upon, 52 ' 



flower, shedding of, 63 



initiation of, 95 



terminal, arrest of, 58 



variation in temperature of, 47 



CALCIUM oxalate, 58 



Callus, after abscission, 69 



Cambium, cork, delimiting sore-shin 



attack, 19 



Cannibalism in cotton, 39, 80 

 Capillarity, restoring water to soil, 43 

 Carbon assimilation. See Photo- 

 synthesis 

 Card Index, 133 



Cell-division, in absciss layer, 69 

 Cellulose, deposition of, in lint, 84 

 Central segment of leaf, 96 



inheritance, 156 



Centre of gravity of root system, 75 

 Certainty, statistical definition of, 92 

 Cessation of growth, 58 



inheritance of. 151 

 Character, record of data for, 1 33 



meristic, inheritance of, 163 



new, bred, 168 

 Characters, complex, 179 



miscellaneous, inheritance of, 175 



qualitative, heredity of, 133 



quantitative, inheritance of, 150 

 Chromosomes, minute size of. 8 



somatic number, 12 

 Cleistogamy, 118 

 Climate. See Meteorology 



surface, 15 

 Climates, new, 179 



reducing transpiration, 44 

 Clouds, effect on growth, 28 



increased growth, 29 



Clouds, affecting tissue-temperature, 



31,48 



affecting stomata, 42 

 effect on leaf-temperature by day and 



night, 48 

 Coalescence, possible, of ovary loculi, 



166 



Coefficient of variation, 92 

 Cold, fictitious killing of seed by, 19 

 Colonial development of cotton 



cultivation, 179 



Colorimetric grading, advisable, 137 

 Colour, of anthers, 139 

 fluctuation in, 92 

 inheritance of, 145 

 matching of, 136 

 of fuzz, 102 

 of leaf, inherited, ,133 

 of lint, inheritance of, 146 

 of petal, inheritance of. 136 

 Column, fluctuation in, 97 



length, inheritance of, 159 

 Commerce and gametes, 175 

 Commercial product. See Lint and 



Spinning 

 general, 105 



varieties, composition of. 89 

 varieties, irregular, lint-length of. 



103 

 Comparison of varieties, 57 



of observations, 55 

 Composite, ray-florets of, 163 

 Composition of groups and races, 89 



of sheddings, 67 

 Computation, of natural crossing, 123 



of records, 55 



Constitutional differences in a popula- 

 tion, 109 



Contamination by parent variety, 112 

 Contraction, of stem in sunshine, 2S 

 Cool; 145 

 Cork, 18-19 

 Correlation, night-temperature and 



growth, 30 

 absent, between seed-weight and 



boll-size in pure strains, 100 

 curvilinear, 95 

 height and first flower, 52 

 in pure strains, of lint-weight and 



seed-weight, 101 

 in growth-rates of branches till 



June, 53 



of internode-lengths, 32 

 of lint-strength with shedding and 



lint-weight, 85 



of lint-weight with seed-weight, 85 

 of height fluctuation and other 



characters, 94 



of flowers, total and bolls, total, 98 

 of seed-weight and ginning out- 

 turn, 101 



of lint-weight and ginning out-turn, 

 101 



