INDEX 



1179 



Sleep, mechanical block theory, 723 



phenomena of, 722 



respiratory quotient in, 515 



theories of, 723 

 Smegma preputii, 895 

 Smell, center for, 690 



nerve of, 644 



sense of, 743 

 Smith and Haldane's method of deter- 

 mining quantity of blood, 227 

 Snake poisons, effect of, on coagulation 



of blood, 225 

 Sneezing, 482 



center for, 641 • 



Snellen's test types, 861 

 Sniffing, 482 

 Snoring, 482 

 Sobbing, 482 



Sodium chlorid, effect of, on muscle, 80 

 in blood, 169 



citrate method of blood transfusion, 

 231 

 Solar spectrum, 879 

 Solution, hyperosmotic, 1025 



hypertonic, 1025 



hyposmotic, 1025 



hypotonic, 1025 



isosmotic, 1025 



isotonic, 1025 



Ringer's, 182 



Stokes's, 186 

 Somachrome cells, 564 

 Somatic cells, 1114 



hunger, 754 



receptors, 727, 730 

 Sound, muscle, 69 



waves, cause, 756 

 character, 756 



conduction by cranial bones, 779 

 rate of speed, 757 

 reinforcement and interference, 

 760 

 Sounds, 757 



color, 759 



intensity, 758 



loudness, 758 



musical, 758 



pitch, 758 



quality, 759 



stamp, 759 



sympathetic vibration or resonance, 

 761 



timbre, 759 



tone, 758 



vocal. See Vocal sounds. 

 Spaces of Fontana, 805 

 Spastic reflexes, 592 

 Spaying, effects of, 982 

 Specific gravity, movement by changes 



in, 38 

 Spectrophotometric method of deter- 

 mining hemoglobin, 190 

 Spectroscope, 192, 193 

 Spectroscopic analysis of hemoglobin 



and derivative compounds, 192 



Spectrum, absorption bands, 192 

 Fraunhofer lines, 193 

 of acid hematin, 195 

 of carbon monoxid hemoglobin, 194 

 of hematoporphyrin, 195' 

 of hemochromogen, 195 

 of methemoglobin, 194 

 of nitric oxid hemoglobin, 194 

 of oxyhemoglobin, 193 

 of reduced hemoglobin, 193 

 solar, 879 

 Speech, 540, 553 

 center, 691 



location, 693 

 circuit, 691 

 Spermatids, 1124 

 Spermatocytes, 1124 

 Spermatogonia, 1124 

 Spermatozoa, 1124, 1125 



development and character, 1124 

 migration of, 1136 

 ovum and, place of meeting, 1137 

 rheotactic quality, 1136 

 thigmotactic quality, 1136 

 Spermatozoon, 1117 

 Sperm-cell, 1117 

 Spermin, 1126 



action of, 982 

 Spherical aberration, 815 

 mirror, 796 



center of curvature, 796 

 concave, 796 

 convex, 796 



reflection from, 797 - 

 geometrical center, 796 

 principal axis, 797 



focus, 797 

 secondary axis, 797 

 Sphincter antri pylori, 1005 

 of Henle, 1128 

 urethrse membranacese, 1128 

 Sphygmogram, 383 



clinical significance, 387 

 Sphygmograph, Dudgeon's, 382 



Marey's, 382 

 Sphygmography, 381 

 Sphygmomanometer, Janeway's, 369 

 Riva-Rocci's, 367 

 von Basch, 366 

 Spinal conduction, localization of, 



methods used for, 609 

 Spinal cord as conducting path, 603 

 as reflex center, 594 

 automatic activity, 597 

 centers, 596 



fasciculi, classification, 612 

 function, 594, 622 

 general structure, 603 

 gray matter, functional basis, 606 

 hemisection, effects of, 626 

 posterior roots, distribution of im- 

 pulses from, 623 

 roots, function of, 519 

 tracts, 610 

 ascending, 616 



