548 



GENERAL IXDEX. 



Secretory fibres proper, definition of, i. 224 

 nerves, evidence for, i. 222 



fatigue of, ii. !••> 



mode of action of, i. 225 



of i he adrenal bodies, i. 272 



of the kidneys, i. 251 



of the liver, i. 247 



of the mammary glands, i. 263 



of the pancreas, i. 2:52 



of tin- stomach, i. 239 



of the sweat •.'lands, i. 259 



salivary, endings of, i. 220 



significance of, i. 214 



stimulation of, i. 222 

 Segmental arrangement of nerve-elements, ii. 

 206 

 reactions, reflex, ii. 210 

 Segmental ion, ii. 167 

 Segmentation-centrosomes, ii. 469 

 Segmentation-nucleus, ii. 466 

 Semen, composition of, ii. I !•"> 

 Semicircular canals, membranous, ii. 373 



of t he bony labyrinth, ii. 371 



relation of, fco equilibrium, ii. 405 



section of, ii. 405 

 Semilunar valves, i. 1 10 

 Seminal vesicles, ii. 1 13 



fond ion of, ii. 1 18 



secretion of, ii. 1 16 



Semi-vowels, ii. 136 



Senescence of tiel'Ve-cel Is, ii. 182 



of tin' central nervous system, ii. 295 

 phenomena of, ii. 486 

 Sensation, cutaneous, definition of, ii. 390 

 muscular, definition of, ii. 390 

 of after-pressure, ii. 394 

 of light, mechanism for the production of, ii. 



331 

 of temperature, ii. .",<i7 

 Sense of equilibrium, ii. 404 



of touch, ii. 392 

 Sensory arc-as of t he cortex, determination of, ii. 

 253 

 conducting paths in the spinal cord, ii. 234 



continuation of, in the brain, ii. 235 

 cortical areas in man. ii. 255 



motor responses from, ii. 253 

 relative functional importance of, ii. 270 

 disturbance from hemisection of the cord, ii. 



230 

 impulses, path of, in the central nervous sys- 

 tem, ii. 226 

 relation of, to the maintenance of the 

 erect posture, ii. 419 

 nerve-endings in skeletal muscle, ii. 402 

 i;i tendon, ii. 102 

 in the skin, ii. 391 

 nerves, influence of, on respiration, i. 463 

 of the heart, i. 172 

 rate of conduct ion in, ii. 91 

 relation of, to the respiratory centre, i. 459 

 reflex influence of, on the pulse-rate, i. 175 

 paths, degeneration of, after section of the 

 dorsal roots, ii. 227 

 in the central nervous system, ii. 226 

 regions of the cortex cerebri, ii. 252 

 stimulation, relation of. to sleep, ii. 29] 

 Septal nerves of the frog's heart, i. 1 * >*» 

 Serous cavities, i. 1 16 



Senat i postici inferiores, respiratory function 

 of, i. 399 

 superiores, inspiratory action of, i. 102 

 Scrum, bactericidal action of, i. 36 

 globulicidal acl ion of, i. ■'!*> 

 osmol ic pressure of, i. 68 



toxicity of, i. 36 



Serum-albumin, action of, on carbonates, i. 517 



Serum-albumin, amount of, in the blood, i. 52 



composit ion of, i 52 



functions of, i. 52 



properties of, i. 52 

 Sex, characters of, ii. 442 



influence of, on heat production, i. 482 

 on pulse-rate, i. 121 

 on respiration, i. 130 



of offspring, determination of, ii. 483 



origin of, ii. 441 



relation of body-temperature to, i. 470 

 of brain-weigh! to, ii. 276 

 Sexual characters, ii. 142 



glands, accessory, ii. 445 



organs, ii. 443 



reproduction, ii. 440 

 congenital variations resulting from, ii. 501 

 t heory of origin of, ii. 441 

 Shark, reflexes in, ii. 212 



removal of cerebral hemispheres in, ii. 263 

 Shivering, i. 362, 491 

 Shrapnell's membrane, ii. 365 

 Siamese twins, ii. 483 

 Silicic acid, properties of, i. 519 

 Silicon, i. 519 



Simple muscular contraction, duration of, ii. 102, 

 108 

 explanation of. ii. Jul 



proteids, i. 57o' 

 Simultaneous contrast, ii. 347 

 Singing voice, ii. 434 

 Sinuses of Valsalva, i. Ill 

 Size, increase of the embryo in, ii. 4*7 



influence of, on pulse-rate, i. 121 



of nerve-cells, ii. 175 

 Skatol, i. 572 



elimination of, i. 340 



occurrence of, in feces, i. 320 

 Skiascopy, detection of astigmatism by means 



of, ii. 319 

 Skin, functions of, i. 341 



glands of, i. 257 



tactile areas of, ii. 395 

 Sleep, ii. 291 



cause of, ii. 292 



condition of the pupils iu, ii. 325 



curve of intensity of, ii. 294 



effect of loss of, ii. 295 

 on metabolism, i. 361 

 on respiration, i. 424 

 on the respiratory quotient, i. 438 



responsiveness to stimuli in, ii. 293 

 Smegma prseputii, i. 257 

 Smell, ii. 408 



comparative physiology of, ii. 409 



subjective sensations of. ii. 410 

 Smooth muscle, rate of conduction in, ii. 89 

 Snails, regeneration of lost parts in, ii. 496 

 Sneezing, i. 454 

 Snoring, i. 455 

 Sobbing, i. 454 

 Sodium ammonium phosphate, i. 523 



carbonates, i. 522, 523 



chloride, nutritive history of, i. 521 



phosphates, i. 522 



sulphate, i. 522 

 Somatic death, ii. 491 

 Somatoplasm, definition of, ii. 496 

 Somatopleure, ii. 472 

 Sound, phvsieal, ii. 381 



quality of, ii. 383 

 Sound-waves, amplitude of, ii. 381 



composite, ii. 384 



limits of perceptions of, ii. 382 



production of. ii. :\-\ 

 Space illusion-., ii. 35 1 

 Space-perception from visual sensations, ii. 347 



