1036 



INDEX. 



Heart-beat, influence of sex and age on the, 412, 



413 



inhibition of the, vagus, 453-457 

 maintenance of the, artificial, Martin's ex- 

 periment, 75 



"negative impulse" of the, 409 

 of pregnancy, 916 

 phenomena of the, 396 

 refractory period and compensating pause of 



the, 447 



rhythmic, cause of, 440 

 solutions maintaining the, 477, 479, 480, 481 

 precautions to be observed in testing, 479 

 stopping of the, a gradual process, 929 

 theory of muscular, 442 



nerve-, of, 441 

 Heart-beat and blood-supply, relation of, in the 



coronary circulation, 477 

 and body-temperature, relationship between, 



579 



Heart-beats, frequency of, 412. 

 Heart-muscle, failure of tetanus in, 122 



function and contraction of, 107 

 Heart-muscles, papillary, and their uses, 402 

 Heart-nerve, depressor, 464 



sympathetic, 467 



Heart-nerves, inhibitory centre of, 467 

 irradiation, 468 

 origin of the nerve-fibres, 468 

 tonus of, 468 

 Heart-sound, first, acoustic analysis of, 411, 412 



second, cause of, 410. 

 Heat, animal body-, 575-604 

 body-, 575-580. See Temperature. 

 sexual, animal, 898 

 Heat-centres, 599, 713, 714 

 Heat-dissipation, channels of, 592 

 mechanism of, 601 

 physiology of, 584-597 

 Heat-dyspnoea, causation of, 550 

 Heat-production after death, cause of, 604 

 by muscular energy, amount of, 132 

 mechanism of, 597 

 physiology of, 597 

 Heat-regulation of the body, 602 

 Helico-proteids, 1020 

 Hemianopsia, 697 

 Hemi-peptone, 231, 241 

 Hemorrhage, extent of, with safe recovery, 361 



regeneration of blood after, 361 

 Heredity, 22, 28, 931-942 

 Hetero-proteose, 230 

 Heteroxanthin, 996 

 Hexoses, 1004 

 Hibernation, absorption and elimination of 



gases during, 542, 546 

 effect on heat-production of, 592 

 Hiccough, 563 

 Histohsematins, 342, 1018 



Histon, action of, in prevention of blood-coagu- 

 lation, 356 



Homothermous animals, 575 

 Horopter, 804 

 Hunger, sense of, 845 

 Hydrate, chloral, 980 

 Hydration, 947 

 Hydrazones, 977 

 Hydrobilirubin, 1015 



of the feces, 260, 263 



Hydrocarbons or paraffins, saturated, 975 

 Hydrogen, 943, 944 

 peroxide of, 949 



preparation and properties of, 943, 944 

 sulphuretted, 950 

 Hydrolysis, 948 



of enzymes defined, 219 

 Hydroquinone, 1011 



Hydroxide, ethyl, 978 

 Hypermetropia, 759 

 Hyperpnoea defined, 548 

 Hypoxanthin, 278, 995 



ILLUSIONS OF TOUCH, 840 



optical, 794-803 

 Images, after-, retinal, 791 



intraocular, 765 

 Imbibition, 948 

 Imidosarcin, 995 

 Imido-xanthin, 996 

 Impulse or apex-beat of the heart, 409 

 Incus, the, 810, 811 

 Indol, 260, 280, 1013 



0-methyl, 1013 

 Induction apparatus, 48, 54 

 Inheritance, facts of, 931 



of acquired characters, 934 



of disease, 935 



of latent characters, 932, 933 



theories of, 936 



Inhibition, cardiac, seat of the power of, 452 

 vagus, 452-457 



of reflex action of central system, 667 



respiratory, 567, 570, 571 

 Innervation, dermal, 673 



of the blood-vessels, 482-501 



of the heart, 440-470 



of the jaw-muscles, 310 



of the lungs, 573 

 Inosit, 1014 



Insane, brain-weight of the, 722 

 Inspiration, mechanism of, 506 



muscles of, 506, 513 

 Inspiration and expiration, relative periods of, 



variations in, 532 

 Intensity of light, 778, 785 

 Intestine, large, absorption in the, 254 

 digestion in the, 248 

 gas of the, composition of, 260 



muscle-tissue of the, contraction-wave of, 309 



secretion of the, 246 



small, absorption in the, 253 

 Intestines, decomposition in the, bacterial, 248 



glands of the, secretory, 184 



movements of the, 320 



pendular movements, 322 

 peristalsis, 320-322 

 conditions influencing the, 323 



nerves of the, extrinsic, 322 



vaso-motor, 498 

 Iodine, 953 

 Iris, the, 768 



movements of the, muscular, 771 



muscles of the, 769 

 Iron, 971 



compounds of, detection of, 972 



in animal and vegetable foods, absorption and 

 excretion of, 295 



in haemoglobin, presence of, 337 



in the body, 972 



in the production of haemoglobin, 263, 295 

 " Iron-free " hsematin, 342 

 Irradiation, retinal. 794 

 Irritability, 38-81 



alterations of, electrotonic, 71 



induced by anelectrotonic and katelectro- 

 tonic changes, 71 



anodic, 68, 69, 70, 72 



degree of, method of ascertaining, 38 



dependent upon oxygen-supply, 73, 74 



duration of, as affected by temperature, 66 



effect of enforced rest on, 81 

 of exercise on, 80 



of frequency of application of stimulus on, 

 72 



