INDEX. 



Segmentation of the orum, 6 

 Self-digestion, 352, 353 

 Self-induction, <>2 

 Semen, chemical composition of, 1115; 



emission of, see Emission of semen 

 Semicircular canals, effects of injury to 



the, 730 

 Seniilunar valves, their action, 184; di- 



crotic wave as affected by closure of, 



'233, 2:54 

 Sensations, special auditory, 998-1006; 



limits of, 1000; fusion of, 1003 



- , cutaneous, 798-811, 1037-1058; im- 

 portance of contrast in, 1056; of pres- 

 sure, 1037; localization of, 1039; of 

 heat and cold, 1041; of pain, 1044; of 

 touch and temperature, terminal or- 

 gans necessary for, 1051 ; of pressure, 

 terminal organs for, 1054; of heat, ter- 

 minal organs, for, different from those 

 of cold, 1056; connection of with the 

 muscular sense, 1066 



- , olfactory, 1025, 1026 



- of taste, 795, 1029-1036 ; usually ac- 

 companied by other sensations, 1029; 

 caused by electrical or mechanical 

 stimuli, 1030; conditions of, 1031; lo- 

 calization of, 10.'2; distribution of ter- 

 minal organs for, 1033; theories as to 

 mode of origin, 1034; nerves for, 1035 



- - , visual, probable progressive de- 



velopment of, 793; general features 

 of, 878; fusion of, 883, 886.; localiza- 

 tion of, 885 ; of colour, 891 ; of colour, 

 due to metabolic changes, 901 ; psycho- 

 logical features of, 929 ; their want of 

 agreement with perceptiSns, 931; re- 

 current, 937 



, afferent, as factors in coordination 

 of movement, 733; crossing of, from 

 opposite hemispheres of brain, 804; de- 

 velopment of, along the spinal cord, 

 805; transmission of, within the brain, 

 808; coordination of motor impulses 

 regulated by, 955 



Sense, the muscular, 1059; of move- 

 ment, of position, and of effort, 1060; 

 afferent impulses forming basis of, 10(51 



Sensibility, general, 104(i; recurrent, 678 



Serous cavities, fluid of, 402 



- fluids, artificial dotting of, 23; char- 

 acters of, 402 



Serum left after clotting of fibrin, 15; 

 chemical composition of, 18-21, 46 



Serum-albumin, its characters, 20; art ion 

 of gastric juice and hydrochloric acid 

 on, 324; importance of, in nutrition of 



Sex, differences of, IIHO 



Shivering from cold, temperature raised 



by, 647 

 Shock, induction, 59; nature of, 697 



Short-circuiting, 58 



Si;; hi , gee Vision 



Sin-ing, power of, dependent on nervoua 

 mechanism, 1087 



Sinuses, venous, of brain, 828; placenta!, 

 1121; quality of blood in, 1125 



Size, judgment of, !*>_' 



Skin, as regulator of heat, 642; different 

 kindsofseiisat ions experienced through 

 the, 1037; as field of touch, 1039 



Sleep, phenomena of, 1154; afferent im- 

 pulses as affected by, 1154; respiration 

 during, 1155; the brain during, 1156 



Smell, sensations of, 1025-1028; cortical 

 area for, 794 



Sobbing and sighing and sneezing, 51 1,512 



Sodium chloride, its action on plasma, 

 22, 26; on mucin, 313; glycholate and 

 taurocholate, 356; hydrate, its effect 

 on the heart, 259; sulphiudigotate, ex- 

 cretion of by kidney, 534 



Solidity, judgment of, 966 



Somatic nerves, 141 



Sound, musical, of contracting muscle, 

 123, 190; of the heart, 188-191, 213, 

 216; waves of, 987; complex, analysis 

 of, 1013 ; psychical nature of apprecia- 

 tion of, 1016 



Sounds, musical, characters of, 1021 ; ap- 

 preciation of outwardness of, 1021; 

 judgment of direction of, 1023; judg- 

 ment of distance of, 1023 



Spectrum, limitations of visibility of, 891 



Speech, cortical area for, 766, 1085; a 

 skilled movement, 766; movements of, 

 bilateral, 766; causes of various imper- 

 fections of, 769; special mechanisms 

 of, 1092-1100 ; sounds made use of in, 

 1092 



Spermatozoa, movements of, 1114 ; action 

 of, in the ovum, 1119 



Sphincters of stomach, their action dur- 

 ing digestion, 377 ; tone of dependent, 

 on cord, 713 



Sphincter ani, its nerve-supply, 381 ; 

 versicse, 545 ; iridis, 858 



Sphygmograph, Dudgeon's, 221 



Sphygmoscope, 220 



Spinal cord, see Cord, spinal 



Spirometer, 428 



Splanchnic nerves, 141, 271 ; inhibitor 

 and augmentor fibres in, 385; ganglia, 

 141, 142 ; abdominal nerve, 266 



Spleen, the, possible formation of red 

 corpuscles in. ''>>: rhythmical action of 

 muscle fibres in, 171; its action during 

 digestion, 368; movements of the, 579; 

 chemical constituents of , 682 ; uric acid 

 in the, 583 



" Spleen-curve," 680 



Spleen-pulp, destruction of red corpus- 

 cles in, 35 



