194 



INDEX 



Family, composed wholly of rogues, 



123 

 Ferrar, 177 

 Fertilisation, 10 

 affecting shedding, 69 

 double, 12 

 self, 113 

 Fibre, cotton. See lint, 81 

 Field conditions, soil temperature 

 under, 15 

 transpiration under, 45 

 Field experiments, precision of, 56 



accumulation of error in, 99 

 Field-germination, 17 

 Field conditions of stomata, 41 

 Field crop, natural crossing in, 113, 

 125 

 amount of natural crossing in, 116 

 flowering in, 63 

 root-interference in, 35 

 shedding in, 67 

 Filament, fluctuation in, 97 

 length, inheritance of, 159 

 Files, 132, 135 



Fine-spinning, varieties for, 105 

 First cross intensification, 168 

 First Flower, the, 51 



correlated with seed-weight, 101 



correlation with height, 52 



delaj'ed by stunting, 52 



efTect on yield, 95 



fluctuation correlated with height, 



95 

 fluctuation in, 98 

 First generation, strong germination 



of, 123 

 Fletcher, F., 5 

 Flood, early, effect in 1909, 54 



effect of arrival of, 64 

 Flower, the first. See First Flower 

 farm, inheritance of, 159 

 fluctuation in form of, 97 

 primordia of, 6 

 structure of, 118 

 un-crossable, 118 

 Flowers, ratio to bolls, 65 

 Flowering, abundant, 62 

 delay in, 52 

 effect of night-temperature upon, 



30 

 irregular caused by sore-shin, 19 

 methods of recording, 55 

 Flowering-curve, the, 61 

 aflfected by water-table, 62, 64 

 de-caudation of, 65 

 eflect of bud-shedding, 63 

 fluctuation in, 98 

 summarising growth of lateral 



branches, 61 

 similar, 72 

 Fluctuation, 89, 91 



affected by age of differentiation, 

 99 



Fluctuation, autogenous, 129 



causing blending of modes, 128 



from various dates of sowing, 53 



in colour, 92 



in growth-curve, 94 



in height and branching, 93 



of pollen-tubes, 124 



selection of, 108 

 Fog, effects of, 43 



Fogs, without effect on tissue-tem- 

 perature, 48 

 Forecast of 1909 disaster, 79 

 Form, of boll, fluctuation in, 99 



flower, inheritance of, 159 



inheritance of, 156, 161 



leaf, 95 



new, 159 



of involucral bract, inheritance of, 

 160 



root system, 33, 75 



stipule, 141 

 Formula for computation of natural 



crossing, 115 

 Frequency polygons, condensed in the 

 diagrams, 133 



dissection of, 129 

 Fruit. See Boll 

 Function of root system, 75 

 Fungoid diseases, 17, 19, 88 

 Fungus, analogy with pollen-tube, 121 

 Fuzz, classes of, 102 



colour, inheritance of, 145 



inheritance of distribution, 142 



irregularity of commercial varieties 

 in, 107 



of seed fluctuation in, 101 

 F,;, definition of symbol, 109 

 Fyaon, 136, 143 



G. herbaceum, 5 



G. hirautum, 5 



G. Sturtii, 97 



G. vitifoUum, 5 



Gallini, 5 



Galvanometer, the "Thread," 15, 47 



Gametes, 6 



and commerce, 175 



nuclear composition of, 124 

 Gametic composition non-uniform, 89 



coupling, probable in lint colour, 

 146 



coupling in petal spot, 139 



differentiation, 125 



impurity, 108 

 Gaussian curve, 1 28 

 Gauze, wire, for exclusion of bees, 118 

 Generation, first pollen of, 124 



sixth raised, 124 

 Genetics, general, 127 



interpreted by fluctuation, 90 

 Geographical distribution of "vari- 

 eties," 106 

 Geology, surface, 88 



