INDEX. 



937 



Small intestine, absorption in, 733 



Smegma prseputii, 792 



Smell, center for, in brain, 204 



end-organ of, 279 

 Smelling, mechanism of, 280 

 Sodium chlorid, nutritive value of, 



833 



salts, effect of, on heart-beat, 520 

 Somatoplasm, definition of, 905 

 Sound, sensations of (see Ear} 

 waves, nature and action of, 372 

 overtones of, 374 



simple and compound, 373 

 Specific energy of taste sensations, 



277 



gravity of blood, 394 

 nerve energies, doctrine of, 116, 254 



of cutaneous nerves, 262 

 Spectra, absorption, blood, 406 

 Spectroscope, 407 

 Spermatozoa, chemistry of, 895 

 maturation of, 893 

 properties of, 893 

 Spermin, 803 



Spherical aberration in eye, 299 

 Sphygmography, 486 

 Sphygmomanometers for determin- 

 ing blood-pressure in man, 467 

 Spinal cord, as path of conduction, 155 

 classification of tracts in, 158 

 effect of removing, 145, 672 

 general relations of gray and 



white matter in, 157 

 groups of cells in, 155 

 Helweg's bundle in, 172 

 homolateral and contralateral 



conduction in, 168 

 less well-known tracts of, 170 

 Monakow's bundle in, 171, 187 

 paths in, for cutaneous impulses, 



167 



pyramidal tracts of, 168 

 reflex activities of, 134 

 tonic activity of, 145 

 tracts of, in lateral column, 165 

 in posterior column, 162 

 in white matter, 158 

 vestibulo-spinal tract, 171, 220 

 reflex movements, 136 

 reflexes in mammals, 139 

 respiratory center, 632 

 Spirometer, 600 

 Spleen, physiology of, 759 

 Stannius, first ligature of, 528 

 Stapedius muscle, function of, 368 

 Starvation, effect of, on body-metab- 

 olism, 843 



Steapsin (see Lipase) 

 Stenson's duct, 687 

 Stereognostic sense, 191 

 Stereoscopic vision, 356 

 Stethoscope, 503 



Stimulants, 677 



nutritive importance of, 836 

 Stimuli, artificial, of muscle, 23 



of nerve, 80 



Stokes- Adams syndrome, 527 

 Stokes 's reducing agent, 409 

 Stomach, absorption in, 718 



anatomy of, 660 



automaticity of, 665 



digestion in, 717 



glands of, 703 



histological changes in, during 

 activity, 704 



means of obtaining secretion of, 705 



mechanism of gastric secretion, 709 



movements of, 661 



musculature of, 661 



properties of pepsin of, 711 



secretory nerves of, 708 

 Strabismus, 350 

 Stromuhr, 449 

 Subliminal stimulus, 325 

 Submaxillary ganglion, 668 

 Succus entericus, 731 

 Sugars (see Carbohydrates) 

 Sugar puncture, 822 

 Sulphur, forms in which excreted, 781 

 Summation of muscular contractions, 

 39 



of stimuli in nerve centers, 131 

 Superior olivary body, relation of, to 



auditory paths, 202 

 Supplemental air, 601 

 Swallowing, 655 



respiration, 657 



Sweat, amount and composition of, 

 788 



nerve centers for, 791 



secretory fibers of, 789 

 Sweat-nerves, action of, in heat regu- 

 lation, 861 



Sympathetic nervous system, general 

 relations, 234 



resonance, 376 

 Syntonin, 714 



Systole, duration of, in heart, 507 

 Systolic arterial pressure, 459 



determination of, in animals, 



461 

 in man, 467 



plateau of ventricular contraction, 

 503 



TABES dorsalis, 164 

 Taste buds, 276 



center for, in brain, 206 

 nerves of, 274 



sensations, classification of, 276 

 specific energy of, 277 

 threshold stimulus, 279 

 sense of, 274 

 stimuli, mode of action, 278 



