IXDEX 



505 



Removal of tissue, and growth, 375. 



Repulsion, by chemical agents, 38 ; by 

 dense solutions, 91. 



Resistance capacity, to poisons, 48 ; to 

 dense solutions, 83 ; to heat, 249. 



Resorcin, poison, 19. 



Response to injurious substances, 39; 

 mechanics of R., 45, 277 ; 480-484. 



Rheostat, 127. 



Rheotaxis, 105-108. 



Rheotropism, 387, 388. 



Rhizoids, hydrotropism of, 257. 



Rhizoma, geotropism, 398. 



Rhizopoda, thigmotaxis, 106; electric 

 stimulus, 129 ; phototaxis, 185; ther- 

 motaxis, 259. 



RICHARDS, E. See JORDAN. 



RICHARDS, H. M., growth and chemi- 

 cal irritation, 332. 



RICHET, toxic dose and temperature, 2. 



RICHTER, varying density, 78, 80, 86, 

 89 ; geotropism, 398. 



Rigor, cold-R., 242; dark-R., 175; 

 desiccation-R., 61; heat-R., 231; 

 light-R., 178. 



RINGER, density, 80. 



RISCHAWI, temperature and excretion, 

 223; electrotropism, 410. 



ROEMER, chemotaxis, 33. 



Roos, iodine and growth, 317. 



Roots, chemotropism, 336 ; hydrotro- 

 pism, 256 ; thigmotropism, 380 ; geo- 

 tropism, 393. 



ROSANOFF, chemotaxis, 108. 



ROSSBACH, 24; strychnin, 25, 26; qui- 

 nine, 2(5; varying density, 78; heat 

 and excretion, 224 ; heat and cilia 

 movement, 228. 



ROTH, temperature and cilia move- 

 ment, 227. 



ROTHERT, transmission of light stimu- 

 lus, 441. 



Rotifera, chloral hydrate, 10; hydroxyl- 

 amine, 15 ; desiccation-rigor, 61, 62 ; 

 cold-rigor, 240 ; heat and dryness, 

 255. 



Rough movements and growth, 370. 



Roux, cytotropism, 52, 53. 



Rubidium, effect on growth, 320. 



RUSCONI, electricity on frog's egg, 405. 



RUSSELL, movements and growth, 371. 



SACHS, penetration of light into plant 



tissue, 165 ; active rays in plant as- 

 similation, 166 ; false phototaxis, 

 181 ; temperature and protoplasmic 

 movement, 225 ; hydrotropism, 256 ; 

 growth, 281 ; silicon and growth, 

 324; hydrotropism, 358; thigmotro- 

 pism, 380, 383 ; geotropism, 393- 

 397, 402 ; light and growth, 417, 418 ; 

 curve of growth, 421; effective rays 

 in growth, 428. 



Salmo trutta, light on eggs of, 426. 



Salts as poisons, 14, 15; chemotactic, 36. 



SAMKOWT, heat-rigor, 232. 



SARGENT, fission and density, 365, 366. 



Schizomycetes, pseudotaxis, 182. 



SCHENCK, effect of twisting on plant 

 growth, 375. 



SCHLOSING, nitrifying organism, 308, 

 310 ; algse and nitrogen, 309 ; free 

 nitrogen and phanerogams, 312. 



SCHMANKEWITSCH, changed density on 

 Flagellata, 76, 77, 86. 



SCHMIDT, movements and growth, 371. 



SCHMITZ, light and growth, 420. 



SCHNEIDER, iron and growth, 321. 



SCHNETZLER, rays affecting growth of 

 tadpoles, 432, 435. 



SCHOLTZ, pulling on plant growth, 372. 



ScHOUMOw-SiMANOwsKY. See NENCKI. 



SCHRODER, strychnin, 26. 



SCHULTZE, M., strychnin, 25 ; temper- 

 ature and protoplasmic movement, 

 225 ; heat-rigor, 232. 



SCHULTZE, 0., temperature and growth, 

 459. 



SCHULZ, salts of arsenic, 4, 5 ; acclima- 

 tization to poison, 28 ; poisons and 

 cell activity, 332. 



SCHURMAYER, chloroform and ether, 

 10 ; cocaine, 24 ; strychnin, 25, 26 ; 

 antipyrin, 27 ; heat and cilia move- 

 ments, 228 ; cold-rigor, 240. 



SCHUTZENBERGER, dry protoplasm re- 

 sists heat, 255. 



SCHWARZ, gravity and Protista, 114- 

 116, 121 ; temperature and irritabil- 

 ity, 230 ; acclimatization to cold, 

 257 ; gravity and growth, 391. 



SCHWEIZER, compression rheostat, 127 ; 

 electric current, 139 ; electrotaxis, 

 147-149. 



Scyllium, effect of changed solution 

 on, 80. 



