INDEX 



581 



Sherrington, 337 



Shive's three-salt solution, 437 



Siedentopf, 97 



Sieve tube, 17 



Silica gel, 142 



SiUcon, 434 



Singer, 534, 535 



Slippage, plane of, 369 



Slyke, van, 327 



Snails, 461 



Sodium, 432 



dispersing effect, 444 

 Sodium glycinate, 484 

 Soil, pH of, 323 

 Solate, 137 

 Sollner, 119 



Solution hypothesis, 284 

 Solutions, 437 



Knop's, 437 



Pfeffer's, 437 



Physiologically balanced, 439 



Ringer's, 439 



Shive's, 437 

 Solvation, 147, 200 

 Sommer, 435 

 S0rensen, 396 

 Spallanzani, 27 

 Species relationship, 385-389 

 Specificity, protein, 498 

 Spectrum, electromagnetic, 390-391 

 Spek, on granular hypothesis, 238 



polarity of cells, 355 



protoplasmic structure, 266 



structure mitotic figure, 263 

 Spemann, 510 

 Spencer, 9 



Sperm, cataphoresis of, 380 

 SpingomyeUn, 463 

 Spierer, dark-field lens, 98, 242 

 Spindle fibers, 20, 26 

 Spiral structure, 153 

 Spireme, 20 



Spirochaetes, charge on, 380 

 Spongioplasm, 266 

 Sponsler, 248 

 Spores, 7 

 Squalene, 467 



StabiUty, 377 



of bacteria, 384-385 



of colloidal particles, 108 

 Stabilizer. 121, 122 

 Stalagmometer, 159 

 Stamm, 249 

 Starch, 456 

 Staudinger, 244, 249 

 Steenbock, 465 

 Sterols, 463-466 



of biological importance, 466-467 

 Steward, 274 

 Stockard, 452 

 Stokes' law, 227 

 Stover, 443 

 Strangeways, radiation, 411 



tissue culture, 67 



types of death, 83 

 Strasburger, fibrillar structure of 

 protoplasm, 244 



kinoplasm, 4, 



spindle fibers, 26 

 Stream potential, 358 

 Stretching, cells, 234 



of protoplasm, 232 

 Strontium, 434 

 Structural continuity in protoplasm, 



261 

 Structure of protoplasm, 236 

 Subculturing, 74 

 Substitution of elements in nutrition, 



440 

 Sucrose, 455 

 Sugars, 454 

 Sugimoto, 355 

 Sulph-hydryl, 520-521 

 Sulphur, 432 



bacteria, 432 

 Supermicellae, 255 

 Surface changes, in cells, 277 

 Surface condensation, 169 

 Surface tension, 287 



definition, 157 



values, 160 



as a vital process, 162 

 Svedberg, kinship, 505 



molecular weight protein, 477, 478 



protein structure, 475 



