INDEX. 



1047 



Respiration, rate of, conditions affecting the : 

 season, 534 

 species, 533 

 temperature, 534 

 types of, 506 



Respirator, Bering's, 557 

 Respiratory quotient, 518, 544 

 conditions affecting the, 545 

 age, 546 



composition of the inspired air, 547 

 diet, 545 



diurnal variation, 546 

 muscular activity, 546 

 species, 545 

 temperature, 546 

 sounds, 517 

 tract, function of, 849 

 Rest, muscular, effect of enforced, 81 



electrical currents of, 137-139 

 Resuscitation from drowning, 553 

 Retina, the, 773 

 activity of the, oscillatory, 790 

 after-images of the, 791 

 " blind spot " in the, 774 

 blood-circulation in the, 768 

 blood-vessels of the, 767 

 changes produced in the, by light, 776 

 color contrast of the, 792, 793 

 sensations upon the, 778-788 

 distance-perception of the, 799 

 fatigue of, 790 

 irradiation of, 794 

 projection of inverted images on, 751 



of a shadow on, 751 

 rods and cones of, function of, 773, 787 



structure of, 775 

 sensation of the, persistence of, 791 



of light on the, 777, 778 

 space-perception of the, 793, 796 

 structure of the, 773, 775 

 stimulation of, phenomena of, 788-791 

 after-effects, 791 

 fatigue, 790 

 latent period, 789 

 rise to maximum of sensation, 789 

 visual purple of the, 776, 784, 1015 

 Retinal image, size of, 750 

 Reversion, hereditary, 932, 933 

 Rheocord, the, 56 

 Rheometer, the, 391 

 Rheonome, 46 



Rheoscope, physiological, 140 

 Rheostat, the, 55 

 Rhythm of respiration, 531-533 

 of muscular contractions, 738 

 Ribs, axes of rotation of, obliquity of, 508 

 eversion of the, 508 

 movements of the, respiratory, 508 



of the intercostal spaces, 509 

 Rigor caloris, 66 

 "cataleptic," 145 

 mortis, 144 



appearance and duration, 145, 146 

 disappearance of, 147 



heat-production during development of, 604 

 influence of nerve-impulses upon, 656 

 reaction of muscle in, cause of, 964 

 Rima glottidis or glottis, 863 



respiratoria, 863 



Ritter-Valli law of irritability, 75 

 "Rivalry of the fields of vision," 803 

 Rods and cones. See Corti and Retina. 

 Running, mechanism of, 861 



SACCHAROSE, 1006 

 Saliva, action of ptyalin on the, 222 

 conditions influencing, 224 



Saliva, amount of, secreted, 221 

 analysis of, 162, 221 

 appearance and specific gravity, 161 

 glands forming the, 159 

 origin of the, 220 

 physiological value of, 224 

 properties and composition of mixed, 221 

 reaction of, normal, 221, 224 

 salts of, inorganic, 221 

 specific gravity of, 161, 221 

 Salivary glands. See Glands. 

 Salt, use of, by herbivora and carnivora, 295 

 Salt-solution, physiological, 362 

 Salts, biliary, 987 

 calcium, excretion of, by the body, 296 



importance of, in food, 296 

 inorganic, nutritive value of, 294 



reactions of, 294 



iron, importance of, to body-metabolism, 295 

 Sapouificatiou, 1000 

 Saprin, 986 

 Sarcin, 995 

 Sarcolemma, 32, 103 

 Sarcoplasm, conductivity of, 82 

 Sarcosin, 982 



Saturation of light, 779, 788 

 Schneiderian membrane, 849 

 Sebum, composition of, 198 

 Secretion, 152-211 



biliary, activity of, formative, 186, 187 

 digestive function of, 265 

 normal mechanism of, 189 

 physiology of, 261 

 quantity of, 186. 187 

 variations in ejection from the liver, 186, 



187 



centre, salivary, 171 



changes in the gastric glands during, 182 

 cutaneous, 197-204 



digestive, exemption of tissues from, 237 

 double, of the liver, 184 

 effect of stimulation of secretory fibres on, 



163, 164 

 from stimulation of secretory fibres, nature 



of, 163, 164 



gastric, cause of, during normal digestion, 181 

 effect of chemical stimulus on the, 182 



of various diets on, 181 

 influence of the central system on, 180 

 quantity of, variation in, 181, 182 

 rapidity of the, during digestion, 176, 177 

 gland, of organic material, conditions deter- 

 mining, 164, 165 



internal, of reproductive glands, 901 

 intestinal, action of, digestive, 246-248 

 color and reaction of, 247 

 composition of, 247 

 method of obtaining, 246 

 quantity of, 184, 246, 247 

 mammary, composition of, 201 

 conditions controlling the, 203 

 control of the, by the nervous system, 203 

 influence of artificial nerve-stimulation on, 



204 



normal, 204 

 of seminal vesicles, 885 

 of small intestine, 246 



of the gastric juice, normal mechanism of, 181 

 of the gastric mucous membrane, acidity of, 



226 



digestive action of, 225 

 methods of obtaining, 225 

 properties and composition, 179, 226 

 of the liver, composition of, 185 

 of the sweat-glands, physiological value, 281 

 of the testis, 211 

 pancreatic, 206, 238 



