342 



INDEX 



Cynips, in oak-galls, 64 

 Cypripedium, amitotic division in, 282 

 effect of shock on streaming move- 

 ments of protoplasm of, II 

 venustum, stomata of, 196 

 Cystopteris, see Filix 

 Cytase, 174, 265, 270 

 Czapek, on nature of geotropism, 72 

 on relation of centrifugal force and 



reaction time, 74 

 on angle at which the maximum 

 geotropic stimulus is received, 75 

 on determination of sensory zone of 



roots, 78, 81 

 on chemical changes in geotropically 

 stimulated roots, 81 



Darwin, F., observations on stomata, 

 197, 199 

 on digestion by Drosera, 271 

 on influence of alternating stimula- 

 tion, 79, 80 

 and Acton, on thermotropism of 

 leaves, 97 

 text- book on physiology, 157 

 Dasylirion filiferum, stomata of, 196 

 Dates, etiolation of seedlings of, 1 14 



See Phoenix 

 Davenport, data on temperatures, 91 



on electrotaxis, 109 

 Day, on forces determining the move- 

 ments of dorsiventral leaves, 306 

 on irritability of dorsiventral organs, 

 136 

 Dean, on Dionaea, 1 8 

 Death, 300, 301, 302 

 Detmer, on apparatus for measuring force 

 ofturgidity, 182 

 on passage of air through leaves, 191 

 on water cultures, 223 

 Devaux on lenticels, 193, 194 

 Desiccation, effect of upon movement of 

 protoplasm, 66 

 influence of on respiration, 251, 252 

 upon vitality of seeds, 66 

 Development, nature of, 1 



influence of chemicals on, 63, 64, 337 

 Diageotropism, 75 



of leaves and dorsiventral organs, 

 136, 306 

 Diaphototropism, 127 

 oileaves, 137, 138 

 of Arisaema, 138, 139 

 See diaheliotropism 

 Diastase, 265, 267, 268 

 determination of, 173 

 influence of oxidase on, 275 



Didymium, reactions of . plasmodia to 

 shock, 10 



hydrotropism of, 68 

 Differential thermometer, 263 

 Diffusion of liquids, 180, 181 



of gases, 188-196 

 Digestion, 250-275 



extra- cellular, 267 



in Drosera, 271, 272 



localization of, 266, 267 



nature of, 264, 265 



of cellulose, 269 



of proteids, 27 1 



of starch, 267, 268, 269 



of sugars, 270, 271 

 Dionaea digestion by, 267 



muscipula, summation of impulses 

 in, 18 



thermotropism of, 100 

 Dissociated salts, toxic action of, 52-54 



chemotactic action of, 58, 59 

 Drosera, contact reactions of, 26, 27, 28 



digestion by, 267, 27 1, 272 



set y apparatus of, 8, 28 

 Disaccharids, 148, 149, 150 

 Dixon, and Joly, on ascent of sap, 216 

 Du-Bois-Raymond inductorium, 105 

 Duclaux, on fermentation by minute or- 

 ganisms, 264 

 Dynamometer, to measure energy of ten- 

 drils, 24, 25 



Echinocactus, irritable stamens of, 1 9 

 Echinocereus, irritable stamens of, 19 

 Effront, on fermentation, 174 

 Electricity, effect of alternating secondary 

 currents, 107 

 effect of continuous stimulation, 106 

 effect of upon growth, 105 



movements of liquids, 101 

 respiration, 251, 252 

 streaming movements of proto- 

 plasm, 104 

 transpiration, 196, 197 

 Electro-germination, 106 

 Electrodes, non-polarizable, 102 

 Electrotaxis, 108, 109 

 Electrotropism, 107, 108 

 Elements, in food plants, 217 

 Energy, derivation and conversions of, 

 250, 251, 252 

 of imbibition, 176, 177, 178 

 Engelmann, curves of absorption of light, 



121 

 Enzymes, classification of, 265, 266 

 clotting, 273, 274 

 determination of, 1 73 



