144 



INDEX. 



Corrections for vapor tension, 137, 138 



for barometric pressure, 138 

 Correlations, 121, 134 

 Cork-borers, 34 

 Corks, 34 



to bore, 41 



to improve, 41 



to make air-tight, 41 

 Corrosion by roots, 74, 101 

 Courses in physiology, 6 

 Critical angle, 131 

 Cross-section paper, 35 

 Curves n, 15, 18, 55, 114 

 Cytology, 9, 52 



D 



Darken bell-jars, 45 

 Dark-room, 27 

 Decay, to prevent, 44 

 Demonstration, 5, 6 

 Desiccation, 59 

 Diffusion, 62 



Diffusion-shells, 36, 62, 137 

 Direction of growth, 118, 119 

 Directive effects 129 

 Discussion, 13 

 Drill system, 10 

 Dynamometer, 141 



Ecological aspects, 59, 77, 83 

 Ecology, definition, 4 



of transpiration, 83 

 Elaborated substances, 77 

 Electrical currents, 57 

 Electrical slide, 58 

 Electrical stage, 57 

 Electrotropism, 133 

 Embryology, 9 

 Endodermis cell, 66 

 Energy, 95 



Errors, individual, n, 15, 18 

 Erythrophyll, 101 

 Essays, 15 

 Etiolation, 115 

 Evaporation, lifting power, 76 



to prevent, 39, 138 

 Excretion, 100 



of water, 83 

 Experiment, 13, 17 



greenhouse, 25 

 stations, 3 



External conditions, Sr, 107 

 External influences, 54 



Fahrenheit to Centigrade, 47 



Ferments, 101 



Fiber saucers, 37 



Ficus leaf, 72 



Formation of special substances, 100 



Frictionless floats, 124 



Full bottles, to cork, 44 



Funnels, 33 



Galvanotropism, 133 



Gas-exchange, 93, 96 



Gas-table, 31, 32 



Gas-tight joint, 141 



Gauges, 137, 138 



Geotropism, 117, 127 



lateral, 127 

 of flowers, 127 

 of leaves, 1 27 

 transverse, 127 



Generalized diagrams, 19 



Generators, 34 



Germinate seeds, 44 



Germination apparatus, 108 



Germination box, 45, 117 



Germinators, 71, 128 



to cleanse, 41 



Glass tubing, 34 



to cut, 38 

 to bend, 39 



Graduates, 33 



Graduate, to, 39, 40 



Grand period of growth, 115, 141 



Gravitation, 54, 119 



Greenhouse, 23 



Growth, 102 



diagrams, JO7 



Guides for laboratory work, 14 



H 



Harmonic optimum, 10 

 Haustoria, 73, 132 

 Heating greenhouses, 23 

 Heat release in growth, in 

 Heliotropic'curvatures, 129 

 Heliotropism, 109, 128 

 Heredity, 133 



Histological differentiation, 107 

 Holes through glass, 43 

 Hydathodes, 84 

 Hydrotropism, 129 

 Hygrograph, 26. 33, 180 

 Hygroscopic awns, 76 



