614 



INDEX 



Spirogyra, arrangement of cells in, 574 



behaviour of non-nucleated pieces of, 

 513, 519 



narcosis of, 372, 521 



respiration of, 520 

 Spirostomum, ciliary motion in, 571 



galvanotaxis of, 459 



granular disintegration of, 326 



narcosis of, 471 

 Sponge-spicules, 169, 172 



formation of, 543 

 Spongin, 109 

 Spontaneity, 347 

 Spontaneous generation, doctrine of, 15, 



20, 298, 302, 309, 311 

 Spore-formation, 197, 205, 281, 344 

 Spores of bacteria, 281, 291 



of Colpoda, 205 



of horse-tail, 224, 448 



of Myxomycetes, 74 

 Splenic fever, resistance of bacilli of, 



291 



Spring-myograph, 361 

 Squaring of circle, problem of, 38 

 Stahl, 16 



Staphylococcus, 431 

 Starch, 112, 172 



digestion of, 154 



formation of, by plant, 159 



in chlorophyll-bodies, 159 



localisation of, in cell, 116 

 Starch-grains, 83, 112 



digestion of, 154 

 Steam engine, comparison of with 



organism, 123 

 Steapsin, 155, 171 

 Stentor, food-ingestioii by, 526 



mechanical stimulation of, 384 



myoids of, 241 



narcosis of, 375 



regeneration of, 61, 541 

 Stimulation and vital conditions, 349 



diagram of, 350 



phenomena of, 364 



threshold of, 351, 436 



unilateral, 428 

 Stimulus, 474 



action of chemical, 365 



action of electrical, 403 



action of mechanical, 379 



action of photic, 397 



action of thermal, 389, 470 



adaptation to, 357 



after-effect of, 358 



and reaction, 353 



assimilatory, 490 



conduction of, 360 



definition of, 348, 357 



dissimilatory, 490 



intensity of, 349 



interference of, 492 



trophic, 351 



varieties of, 348 



Structure and liquid, 538 



conception of, 538 



Struggle for existence, 8, 28, 185, 317 

 Sulphur-bacteria, 278 

 Sulphuric acid as decomposition -pro- 

 duct of proteid, 110 



manufacture of, 125, 156, 484 

 Susruta, 7 

 Swammerdamm, 15 

 Swarm-spores, phototaxis of, 448 

 Swimming-plates of Ctenophora, 249, 



570 



Sylvius, 15 



Symbiotic organisms, 84 

 Symptomatic anthrax, bacilli of, 287 

 Syncytium, 74 



TACTIC movements, mechanism of, 497 

 Tadpole, galvanotaxis of, 455 



histolysis of tail of, 321 

 Tardigrada, desiccation of, 129 

 Teleology, 182, 318 



Temperature as general vital condition, 

 288 



determination of, 258 



maximum of, 288, 291, 396 



minimum of, 288, 395 



of organism, 257 

 Temperature-sense, 391 

 Tetanus, analysis of, 423 



bacteria of, 287 



closing, 414 



mechanical, 385 



metabolism in, 388 



Thalassicolla, behaviour of non-nucle- 

 ated pieces of, 512 



chemical stimulation of, 370 



mechanical stimulation of, 379 



rising and sinking of, 230 



spore-formation of, 344 

 Theoria generationis of Wolff, 17 

 Thermo-chemical equivalent, 214 

 Thermo-electric element, 258 

 Thermotaxis, 451 

 Thigmotaxis, 440 

 Threshold of stimulation, 351, 436 

 Tissue, 60 



Tone, muscular, 358 

 Torpado, 269 

 Toxalbumins, 176 

 Toxalbumoses, 176 

 Toxines, 175, 468 



Tradescantia, electrical stimulation of, 

 423 



protoplasmic streaming in, 239, 393 

 Transpiration ,174 

 Treviranus, 19 

 Trophic nerves, 353 



stimuli, 351 

 TropliQtaxis, 430 

 Trypsin, 109, 154, 171 

 Tuberculin, 176 

 Tuberculosis, growth of bacilli of, 391 



