INDEX 



1057 



Semicircular canals, 823, 833, 956, 957 

 and equilibration, 834, 837 

 and forced movements, 836 

 Semilunar valves, 79, 191 



and dicrotic wave, 96 

 moment of closure of (S. C. 



point), 89 



Semisection of cord, 793 

 Sensations, dissociation of, 795, 796 

 localization of, 982 



after section of cutaneous 



nerves, 980 



relation of, to stimulus, 984 

 Senses, the, 891 



Sensibility of internal organs, 973, 981 

 Sensori-motor functions of ' motor ' 



cortex, 856 

 Sensory areas, 857 



paths to brain, 791, 794, 779 

 decussation of, 793 

 Serin, 332 



Serous glands, 319, 346 

 Serum, 24, 26, 27, 30, 41, 57 

 composition of, 41, 57 

 conductivity of, 317 

 ferments in, 42 

 freezing-point of, 26, 357 

 specific gravity of, 25, 57 

 reaction of, 57 

 Serum-albumin, 41, 42, 49, 57 4^7 



498 



amino- acids in, i 

 crystallization of, 3 



Serum-globulin, 32, 41, 42, 49, 57, 487 

 Serum-proteins, in starvation, 498 



source of, 498 



Serratus posticus, action of, in respira- 

 tion, 211 



Seventh nerve, 822 

 Sexual organs, internal secretion of, 



556 



Shadow test. See Skiascopy 

 Sham feeding, 324, 352, 374 



in puppies, 378 

 Shivering and temperature regulation, 



59i 



Shock, spinal, 786, 800, 808 

 surgical, 175 



acapnia as a factor in, 169, 175 

 Side -chains, 635 

 Sighing, 239 



Sigmoid flexure, 309, 311 

 Signal, electric, 626 

 Silent areas of cortex, 865 

 Single vision, theories of, 923 

 Sino-auricular junction, stimulation of, 



183 



node, 72 

 Sinus venosus, 72 



stimulation of, 144 



Sixth nerve or abducens, 822 

 Skate, electrical organ of, 738 

 Skatol, 333, 395 

 Skatoxyl in urine, 436, 445 

 Skin, currents of, 734 

 excretion by, 473 

 impulses from, in equilibration, 



835 



respiration by, 275 

 varnishing of, 276, 474 

 Sleep, 873 



amount necessary, 876 



cerebral circulation in, 875 



depth of, 876 



effect of, on pulse, 99 



gaseous exchange in, 245 



intracranial pressure in, 875 



plethysmographic tracings from 



arm in, 875 



theories of causation of, 875 

 Smell, 965, 999 



centre for, 817, 86 1 

 Snake venom, effect of, on coagulation, 



39 



on blood-corpuscles, 27 

 Sneezing, 239 



Soda-lime, absorption of carbon di- 

 oxide by, 241, 294 



Sodium, relation of, to heart-beat, 139 

 chloride, action of, on heart- 



strips, 185 



amount needed in food, 550 

 influence of potassium 



salts on, 550 

 citrate solution for blood -pressure 



tracings, 195 



hydrosulphite, absorption of oxy- 

 gen by, 251 



Solidity, judgment of, 925, 926 

 Sorbite, relation of, to dextrose, 3 

 Soret's haemoglobin band in violet, 45, 



47 

 Sound, cranial conduction of, 960, 999 



pictures, 964 



Sounds, complex, analysis of, 962 

 Specific energy, 870, 980 



sensibility, 980 

 Spectroscope, 43, 65 

 Speech, 282 



centre for, 862-864, 872 

 Spermaceti, absorption of, 414 

 Spermatozoa, development of, 1004 

 Spermin, 556 



Spherical aberration, 912, 991 

 and irradiation, 950 

 Sphincter ani, 311, 813 

 . cardiac, 302, 309 

 ileo-colic, 308, 310 

 pylori, 305, 309 



Sphygmic period of cardiac cycle, 90 

 6 7 



