INDEX 



Abnormal lint-length obtainable, 104 

 Absciss layer, 68 

 Abyad, 5 



Acceleration of growth by tempera- 

 ture, 21, 25 

 Acclimatization, 110, 179 

 Accumulated temperature, 29 

 Accumulation of errors in field experi- 

 ments, 99 

 Aeration, controlling sore-shin attack, 



19 

 Aeroplane, afifecting Egypt, 179 

 Afifi, 5 

 Afternoon, condition of plant during, 



43 

 Age, of commercial varieties, 106 



affecting fluctuation in height, 93 



of .act of crossing, 114 



of differentiation, affecting fluctua- 

 tion, 99 



of leaf, influencing photosynthesis, 

 51 



of leaf, affecting temperature, 47 



of stomata, 40 



of a variety, 112 

 Agricultural characteristics, complex 



inheritance of, 179 

 Alkali soil, 88 

 Allard, 66, 113, 143 

 AUelomorphic pairs, in Egypto-Upland, 



124 

 Allelomorphs, three pairs in petal 



colour, 137 

 Alpino, Prosper, 2 

 Analysis, of hybrid families, 128 

 Angle, of leaf-sinus, 96 

 Angles, of sinus, inheritance of, 158 

 Anthocyanic strains, 120 

 Anthooyanin, fluctuation in, 92 



spot on leaf, 133 

 Anthers, colour of, 139 

 Antirrhinum, 168 

 Aperture, of stomata, 40 

 Area, of twelve first leaves, 47 

 Areas, under cotton in Egypt, 177 

 " Arrival" of the crop, 30 

 Arrival, of crop, 51 

 "Arrival-curve" in time, paraboloid 



form, 53 

 Ashmouni, 5 



putative ancestor of varieties, 105 



Asiatic type of plant, 3, 5 

 Asphyxiation, of root, 38, 60 

 Assimilation of carbon. See Photo- 

 synthesis 

 Atkinson, 17 

 Audebeau, ii, 72, 176 

 Autogenous fluctuation, 129 



affecting leaf-length, 157 



aflFecting lint quality, 148 



forming modes, 170 



in seed- weight, 167 



possibly afleoting lint colour, 146 

 Automatic records of stomatal changes, 



40 

 Auto-toxy, 60 

 Autumn, 51 



temperature of, 98 

 Autumnal period, the, 54 



Bactkbiology, soil, 88 



Bagging, of flowers, 117 



Balance, Joly spring, for transpiration, 



45 

 Barrage, the Delta, 65 

 Bateson, 152 



Bee-proof cages, use of, 178 

 Bees, agents of natural crossing, 117 

 Benachi, 148 

 Biometry. See Correlation and Probable 



error 

 Blachman, 25, 47, 88 

 Boll-divisions. See Ovary loouli, 163 

 Boll, fluctuation in form of, 99 



maturation of, 66 



size and form, inheritance of, 161 



surface, inheritance of, 142 



variation in temperature of, 47 

 Boll-shedding. See Shedding 

 Boll-size, correlated with seed-weight, 

 170 



not correlated with seed-weight in 

 pure strains, 100 

 Boll-worm, 4 



confused with fog, 43 



effect on tissue temperature, 48 

 Boiling, abundant from decreasing 

 flowers, 71 



methods of recording, 55 

 Boiling-curve, the, 65 



