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 



inheritanceof quantitativecharaoters, 

 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-efiect, 28 



temperature of seed-bed, 15 



tissue-temperatures, 47 



transpiration, 44 



varietal impvirity. 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 Ali, 3, 5 

 Moist chamber, special, 20 

 Monopodia, 62 

 Morning, maximum photosynthesis in, 



51 

 Mother-cells of gametes, 6, 7 

 Mummy-cloths, 1 

 Mutation, 97, 178 



NacamuU, 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 Fj, 128 

 Netting of pure strains, 91 

 Network of sore-shin throughout 



Egypt, 18 

 Night, clouds during, affecting tissue 



temperature, 48 

 Night-temperature, 29, 30 



affecting first flower, 53 



losing control of growth, 59 

 Nile valley, a long field for research, 180 

 Nubari, probable future of, 105" 

 Nuclear composition of gametes, 124 

 Nuclear division, mechanism of, 8 

 Nucleus of lint-cell, 82 

 Nyctitropism, 88 



Oeservation-kow 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 



Pakaboloid form of curve of 



" arrival " in time, 53 

 Parasitism, of pollen-tube, 121 

 Parents, commercial, resemblance of 



offspring to, 110, 114 

 Pedigree of pure strain in lint-length, 103 

 Percentage, probable error, 92 

 Perception of colour, 92 

 Perennial growth. See Kattoons 

 Periods of development, 54 

 Pertz, 40 

 Peruvian type of plant, 2, 5 



stock, probable, in hybrid, 132 

 Petal, colour of, 134 



colour-inheritance, 1.36 



fluctuation in, 97 



length, inheritance of, 159 



spot, inheritance of, 138 



