342 



INDEX 



Cynips, in oak-galls, 64 

 Cypripedium, amitotic division in, 282 

 effect of shock on streaming move- 



ments of protoplasm of, II 

 venus/um, stomata of, 196 

 Cyst opt eris, 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, 8 1 



on chemical changes in geotropically 

 stimulated roots, 8l 



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, 114 



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 



uence of on respiration, 251, 252 



upon vitality of seeds, 66 

 Development, nature of, I 



influence of chemicals on, 63, 64, 337 

 Diageotropism, 75 



of leaves and dorsiventral organs, 



136, 306 

 Diaphototropism, 127 



of leaves, 137, 1 38 



of Aritaema, 138. 139 



See diaheliotropism 

 Diastase, 265, 267, 268 



determination of, 173 



influence of oxidase on, 275 



Didymium, reactions of plasmodia to 

 shock, lo 



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, 271 



of starch, 267, 268, 269 



of sugars, 270, 271 

 Dionaea digestion by, 267 



muscipula, summation of impulses 

 in, 18 



thermotropism of, loo 

 Dissociated salts, toxic action of, 52-54 



chemotactic action of, 58, 59 

 Drosera, contact reactions of, 26, 27, 28 



digestion by, 267, 271, 272 



sensory 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 



ILchinocacttts, irritable stamens of, 19 

 EchinocerctiS) 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, loi 

 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, 173 



