INDEX 



497 



Dogs, potassium and growth of, 319. 



Dolium, and sulphuric acid, 28. 



DOWNES, analytic effect of light, 163 ; 

 bactericidal effect of light, 171-173. 



DOYERE, desiccation, 62 ; heat on 

 Rotifera, 255. 



Dragon-fly larvae, electric stimulation, 

 137. 



DRAPER, assimilation in plants, 166. 



DRIESCH, phototaxis, 202 ; growth, 

 282 ; geotropism, 400 ; phototropism, 

 443. 



Drosera, organic acids, 13 ; thigmo- 

 taxis, 99 ; thigmotropism, 383, 481. 



Drosophyllum, and contact, 99. 



Dryness and protoplasm, 59, 60. 



DRYSDALE, heat and protoplasm, 256. 



DUBOIS, response to light, 207. 



DUCHARTRE, hydrotropism, 256. 



DUCLAUX, chemical effect of light, 162, 

 163 ; election of food, 333. 



DUTROCHET, molar agents, 100 ; tem- 

 perature on protoplasm, 225 j accli- 

 matization to heat, 252 ; twining, 

 377. 



Duvalia, germination, 424. 



Earthworm, nicotin, 24 ; phototaxis, 

 203. 



Echinodermata, nicotin, 24 ; density, 

 79 ; electric current, 137 ; phototaxis, 

 194 ; light on growth, 434 ; optimum 

 temperature for growth, 458. 



Echinoids, strychnin, 26. 



EDWARDS, light on growth, 425. 



Effective rays in growth, 427-436 ; in 

 phototropism, 440. 



Egg, food materials in, 303 ; phospho- 

 rus, 313 ; iron, 322 ; electricity, 403. 



EHRENBERG, heat, 251. 



EHRLICH, ricin, 31 ; acclimatization to 

 poison, 32. 



Electricity, 126 ; protoplasm, 129-153 ; 

 electrotaxis, 140-151; growth, 405- 

 414 ; electrotropism, 409-414. 



Electrotaxis, 140-151. 



ELFVING, chloroform, 9; light, 174; 

 gravity and growth, 391 ; geotro- 

 pism, 398. 



Embryos, phosphorus, 314 ; light, 417, 

 418. 



EMERY, salt absorption, 88. 



Encystment, 256. 



2K 



ENGELMANN, chemotaxis, 32, 34 ; den- 

 sity, 86 ; electricity, 130, 132, 135 ; 

 bacteria and spectrum, 168 ; dark- 

 and light-rigor, 176, 178 ; changing 

 light intensity, 179 ; phototaxis, 182, 

 183, 187, 202, 207; retinal move- 

 ments, 193 ; photopathy and chem- 

 ical agents, 201 ; temperature, 227, 

 231. 



Entomostraca, density, 81. 



ENTZ, photopathy, 188. 



Ephydra, acclimatization, 28. 



Epistrophe, 190. 



Epithelium, ciliated, 129, 227. 



ERLACH, acclimatization, 29, 30. 



ERRARA, hydrotropism, 359; thigmo- 

 tropism, 381, 



ESCHENHAGEN, growth and density, 

 362. 



ESCHLE, iodine and growth, 317. 



Ether, 9, 10. 



Ethylaldehyde, protoplasm, 21. 



Euglena, chemotaxis, 33 ; phototaxis, 

 183 ; acclimatization to cold, 257 ; 

 therm otaxis, 261. 



EWALD, electrotaxis, 147-150. 



Excretion and poisons, 51. 



EXNER, pigment and light, 193. 



Extent of medium and size, 473. 



FABRE-DOMERGUE, density, 76, 86. 



Fallow ground, enrichment, 310. 



False, phototaxis, 181 ; traumatro- 

 pism, 384 ; geotropism, 392 ; electro- 

 tropism, 409. 



FAMINTZIN, phototonus, 177 ; photo- 

 taxis, 182; chlorophyll position, 

 189 ; light and growth, 430. 



FATIGATI, rays which disturb metabo- 

 lism, 170. 



FAYRER, serpent poison, 28. 



FECHNER, threshold stimulation, 434. 



FERE, temperature and chick's growth, 

 459. 



FICK, electric stimulation, 133. 



FIGDOR, phototropic limit, 439. 



Fish, density-effects, 79-82 ; rheotaxis, 

 109 ; temperature and growth, 458, 

 459 ; medium and size, 474. See also 

 Gold-fish. 



Flagellata, chemotaxis, 33, 36, 45; 

 salt-absorption, 86, 89; phototaxis, 

 182; acclimatization to heat, 252, 255. 



