INDEX 



1313 



Sebum, 1216 



Secre tin, gastric, 740 



pancreatic, 755 

 Secretion, electrical changes accompanying, 



169, 717 



energy involved in, 719 

 histological changes during, 715 

 internal, 1230-1247 

 mechanism of, 713 

 of milk, 333, 1289, 1296 

 relation of nucleus to, 31 

 Seedlings, occurrence of asparagine in, 82 

 Semicircular canal, 652 

 Semipermeable, definition of, 123 

 Sensation bodies in brain, 421 



cortical appreciation of, 446 

 disturbances of, 441 

 localisation of, 443 

 cutaneous, 626-638 

 gustatory, 640 



histological elements involved, 637 

 in invertebrata, 293 

 labyrinthine, 651 

 localisation of, 303 

 measurements of, 479 

 of movement, 646 

 Mutter's law of, 481 

 olfactory, 642 

 pain-, 634 

 paths of, 324 



in central nervous system, 



446 * 



in cord, 357 

 projection of, 481 

 relation to stimulus, 478, 482 



in eye, 555-568 

 spatial, 651 

 static, 646 

 tactile, 629 

 temperature-, 626 

 Weber's law of, 483 

 Sense organs, physiology of, 478-656 

 classification of, 479 

 fatigue of, 482 

 projicient, 293 

 of skin, 637 



Sensibility, recurrent, 323 

 Sensoparalysis, 345 

 Sensory functions of cortex, 443 

 nerve roots, 322 

 tracts in brain stem, 384 

 Septo-marginal bundle, 353 

 Serine, 80 

 Serum albumin, 74, 95 



colloids, molecular weight of, 142 

 globulin, 95 

 Sexual process, essential functions of, 1251 



reproduction, 1254 

 Shock, nervous, 330 



in man, 337 



Silicon, significance of, 44 

 Skatol, 813 



Skin, functions of, 1214-1218" 

 innervation of, 326 

 structure of, 1214 

 Sleep, state of pupils in, 508 

 Smecttey, theory of fat synthesis, 119 

 Smell, cortical localisation of, 449 

 Soaps, formation of, 55 

 Sodium, 43 



Sols, 137 



Solutions, energy of, 121 



Sound analysis, 596 



in ear, theories of, 609 

 appreciation of, 611 

 conduction of, 600 

 localisation of, 616 

 muscle-, 241 

 properties of, 595 

 Spastic paraplegia, 336 



Specific dynamic action of protein, 681,688,804 

 irritability, law of, 255, 480 

 rotatory power, 52 

 Spectra luminosity, curves of, 556 

 Spectrum, 486 



energy of, 489 

 Speech, central mechanism of, 453-457 



mechanism of, 623-625 

 Spermatozoa, composition of, 95, 99 

 development of, 1271 

 formation of, 1259 

 Spherical aberration of eye, 531 

 Sphingosine, 58 



Spinal animal, 329 



conduction, 344 

 cord, 315-359 



anatomy of, 351 



classification of nerve cells in, 318 

 as conductor, 351-359 

 course of fibres in, 319 

 development of, 297 

 effect of poisons on, 347 

 of transection, 330 



in man, 336 

 grey matter of, 324 

 hemisection of, 359 

 methods of studying tracts in, 



319 



motor functions of, 327 

 paths in, 324 



of impulses in, 356 

 reflex functions of, 322, 329 

 structure of, 315-321 

 tracts of, 352 

 trophic functions of, 349 

 visceral functions of, 327 

 nerve roots, central connection of, 324 

 dilator functions of, 323 

 functions of, 323-337 

 reflex, nervous paths of, 328 

 reflexes, structural basis of, 324 

 shock, 330 



Spindles, muscle-, 334, 648 

 Spino-tectal' tract, 354 

 Spino-thalamic tract, 354 

 Spleen, functions of, 1245-1247 

 Spongin, 106 

 Spongioblasts, 298 

 Spongioplasm, 18 

 Squint, 497 



treatment of, 499 

 Stapedius muscle, 603 

 Starch, digestion by saliva, 707 



formation in plants, 6, 17, 37, 107 

 molecular structure of, 69 

 properties of, 68 



Starvation, loss of weight during, 671 

 metabolism during, 670 

 nitrogenous excretion during, 674 



