INDEX. 



1057 



Sixth cranial nerve, nucleus of, 249 

 Skatoxylsulphuric acid, 862 

 Skeletal muscular tissue, structure of, 



17 



Skiascope, 333 

 Skin, excretory functions of, 867 



sweat glands of, 867 

 Sleep, changes in circulation during, 



261 



curves, intensity of, 260 

 effect of sensory stimulation during, 



264 



hypnotic, 269 

 metabolism during, 944 

 physiological phenomena of, 258 

 theories of, 265 



Small intestine, absorption in, 806 

 Smegma prseputii, 871 

 Smell, center for, in brain, 216 



end-organ of, 299 

 Smelling, mechanism of, 300 

 Sodium chlorid, nutritive value of, 932 



salts, effect of, on heart-beat, 574 

 Somatoplasm, definition of, 1020 

 Sound, sensations of. See Ear. 

 waves, nature and action of, 394 

 overtones of, 397 

 simple and compound, 395 

 Specific energy of taste sensations, 297 

 gravity of blood, 420 

 nerve energies, doctrine of, 121, 273 



of cutaneous nerves, 281 

 Spectra, absorption, blood, 432 

 Spectroscope, 433 

 Spermatozoa, chemistry of, 1006 

 maturation of,. 1004 

 properties of, 1004 

 Spherical aberration in eye, 319 

 Sphincter, cardiac, 724 

 external, of anus, 739 

 ileocecal, 737 

 internal, of anus, 739 

 of bile-duct, 827 

 of bladder, 864 

 Sphygmography, 526 

 Sphygmomanometers for determining 



blood-pressure in man, 503 

 Spinal cord as path of conduction, 162 

 classification of tracts in, 165 

 effect of removing, 153 

 general relations of gray and 



white matter in, 164 

 groups of cells in, 162 

 Helweg's bundle in, 181 

 homolateral and contralateral 



conduction in, 176 

 less well-known tracts of, 180 

 Monakow's bundle in, 180 

 paths in, for cutaneous impulses, 



174 



pyramidal tracts of, 180 

 reflex activities of, 140 



67 



Spinal cord, tonic activity of, 152 

 tracts of, in lateral funiculi, 172 

 in posterior funiculi, 169 

 in white matter, 165 

 vestibulospinal tract, 181, 235 



reflex movements, 142 



reflexes, 142 



in mammals, 145 



respiratory center, 692 

 Spirometer, 657 

 Spleen, physiology of, 836 

 Stannius, first ligature of, 582 

 Stapedius muscle, function of, 390 

 Starvation, effect of, on body-metab- 

 olism, 945 



Steapsin. See Lipase. 

 Stenson's duct, 758 

 Stereognostic perception, 204 

 Stereoscopic vision, 378 

 Stethoscope, 556 

 Stifel's figure, 336 

 Stimulants, 747 



nutritive importance of, 935 

 Stimuli, artificial, of muscle, 24 



of nerve, 84 



Stokes-Adams syndrome, 582 

 Stokes' reducing agent, 435 

 Stomach, absorption in, 791 



anatomy of, 725 



automaticity of, 730 



digestion in, 790 



glands of, 774 



histological changes in, during 

 activity, 775 



means of obtaining secretion of, 776 



mechanism of gastric secretion, 781 



movements of, 726 



musculature of, 726 



properties of pepsin of, 784 



secretory nerves of, 780 

 Storage proteins, 905 

 Strabismus, 370 

 String galvanometer, 99 

 Stromuhr, 485 

 Subliminal stimulus, 346 

 Submaxillary ganglion, 758 

 Substrata, 752 

 Succus entericus, 804 

 Sugar puncture, 918 



regulation of supply of, in body, 



918 



Sugars. See Carbohydrates. 

 Sulphur, forms in which excreted, 861 

 Summation of muscular contractions, 

 43 



of stimuli in nerve-centers, 138 

 Superior olivary body, relation of, to 



auditory paths, 215 

 Supplemental air, 658 

 Surface area law, 966 

 Swallowing, 719 



respiration, 721 



