INDEX 



197 



Meteorology, at Cairo, 14, 16, 17, 27, 



46 



clouds and dust-storms, 29 > 

 Methods of investigation, in second 



half of development, 55 

 of gametic differentiation, 126 

 Methods of investigating, autogenous 



fluctuation, 129 

 fluctuation. See each character, in 



Chapter V 



for photosynthesis, 50 

 fungus-growth and temperature, 20 

 heredity, 132. See also Fluctua- 

 tion 



in genetics, 91 

 inheritance of quantitative characters, 



150 



internode-length, 31 

 Ledger and Files, 94 

 length of lint, 82, 87 

 lint, 81 



natural crossing, 113 

 of root-system, 37, 39, 79 

 parasitism of pollen, 122 

 root-depth, 77 



root-growth and temperature, 24 

 shedding, 66 

 soil-water, 76 ^ 



stomatal changes, 40 

 sunshine- effect, 28 

 temperature of seed-bed, 15 

 tissue-temperatures, 47 

 transpiration, 44 

 varietal impurity, 111 

 water-table effects, 70-75 

 Microscopic examination of lint, 82 

 Mid-rib. See Leaf -length 

 Minor varieties, 105 

 Mixture between varieties, 111 

 Modes, appression of, 128 



origin of, by autogenous fluctuation, 



170 



yearly coincidence of, 130, 155 

 Mohammed AH, 3, 5 

 Moist chamber, special, 20 

 Mouopodia, 62 

 Morning, maximum photosynthesis in, 



51 



Mother-cells of gametes, 6, 7 

 Mummy-cloths, 1 

 Mutation, 97, 178 



Nacamuli, 148 



Naphthalene, dressing for seed, 20 



Napoleon Buonaparte, 2 



Native cultivator, limitations of, 179 



Natural crossing, 113 



and floral structure, 118 



cause of, 117 



computation of, 123 



factors influencing, 120 



formula for, 116 



in field crop, 125 



Natural crossing, prevention of, 117 



research desirable on, 180 

 Natural selection, 110 



effect of, 107 

 Necessary facilities for heredity 



researches, 128 

 Nets, mosquito, 117 



disadvantage of, 127 



invariably used on F 1; 128 

 Netting of pure strains, 91 

 Network of sore-shin throughout 



Egypt, 18 

 Night, clouds during, affecting tissue 



temperature, 48 

 Night-temperature, 29, 30 



ail'ecting first flower, 53 



losing control of growth, 59 

 Nile valley, a long field for research, 180 

 NubarL probable future of, 105 . 

 Nuclear composition of gametes, 124 

 Nuclear division, mechanism of, 8 

 Nucleus of lint-cell, 82 

 Xyctitropism, 88 



OBSERVATION -ROW method, 57 

 Observations, of flowering, &c., 55 

 Offspring of selected plants, 110 

 Oil, 13 

 Okra-leaf, 97 

 . Ontogeny of leaf, 95 

 Optimum temperature, significance of, 



25 



Origin of modern varieties, 3 

 Oscillation, rapid, in leaf temperature, 



48 



of functional C.G. of root, 78 

 Out-turn on ginning. See Ginning 



out-turn 

 Ovary, loculi, inheritance of, 163 



loculi of. See Boll, loculi of 

 Ovary, primordia of, 6 

 Over-heating of tissues from water- 

 shortage, 50 

 Oxygen, deficiency in soil, 38 



PARABOLOID form of curve of 



"arrival " in time, 53 

 Parasitism, of pollen-tube, 121 

 Parents, commercial, resemblance of 



offspring to, 110, 114 

 Pedigreeofpurestrain in lint-length, 103 

 Percentage, probable error, 92 

 Perception of colour, 92 

 Perennial growth. Sea Rattoons 

 Periods of development, 54 

 Pertz, 40 

 Peruvian type of plant, 2, 5 



stock, probable, in hybrid, 132 

 Petal, colour of, 134 



colour-inheritance, 136 



fluctuation in, 97 



length, inheritance of, 159 



spot inheritance of, 138 



