INDEX. 



1337 



Segmentation of the ovum, 6 



Self-digestion, 352, 353 



Self-induction, 62 



Semen, chemical composition of, 1115; 

 emission of, see Emission of semen 



Semicircular canals, effects of injury to 

 the, 730 



Semilunar valves, their action, 184; di- 

 crotic wave as affected by closure of, 

 233, 234 



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, 1032 ; 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 perceptions, 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, 1061 



Sensibility, general, 1046 ; recurrent, 678 



Serous cavities, fluid of, 402 



fluids, artificial clotting of, 23; char- 

 acters of, 402 



Serum left after clotting of fibrin, 15; 

 chemical composition of, 18-21, 46 



Serum-albumin, its characters, 20 ; action 

 of gastric juice and hydrochloric acid 

 on, 324; importance of, in nutrition of 

 muscle, 652 



Sex, differences of, 1150 



Shivering from cold, temperature raised 

 by, 647 



Shock, induction, 59; nature of, 697 



Short-circuiting, 58 



Sight, see Vision 



Singing, power of, dependent on nervous 

 mechanism, 1087 



Sinuses, venous, of brain, 828; placental, 

 1121; quality of blood in, 1125 



Size, judgment of, 962 



Skin, as regulator of heat, 642; different 

 kinds of sensations 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,511,512 



Sodium chloride, its action on plasma, 

 22, 26; on mucin, 313; glycholate and 

 taurocholate, 356; hydrate, its effect 

 on the heart, 259; sulphindigotate, 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; 

 versicae, 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, 36; rhythmical action of 

 muscle fibres in, 171; its action during 

 digestion, 368; movements of the, 579; 

 chemical constituents of, 582 ; uric acid 

 in the, 583 



" Spleen-curve," 580 



Spleen-pulp, destruction of red corpus- 

 cles in, 35 



