INDEX. 



1031 



Guanin, 65, 851 



Guanosin, 852 



Gudden's commissure, 209, 216 



HARMONY, physiological cause of, 402 

 Haustral churning, 732 

 Hearing. See Ear. 

 cortical center of, 212 

 limits of, 402 

 Heart, accelerator center for, 595 



nerves of, 591 

 action, current of, 542 



of inhibitory nerves, 581 

 analysis of inhibition, 583 

 apex-beat of, 545 



auriculoventricular bundle, 536, 576 

 automaticity of, 564 

 capacity of ventricles of, 557 

 cardiac nerves of, course, 581 

 cardiogram, 546 



cardio-inhibitory center of, 586 

 causation of beat, 564 

 change in form of ventricle in sys- 

 tole, 544 



compensatory pause of, 576 

 contraction wave in, 540 

 coronary circulation in, 559 

 course of cardiac nerves, 581 

 depressor nerve of, 614 

 diastasis of, 551 

 diastole and systole of, 533 

 time relations of, 557 

 effect of calcium upon, 570 

 of drugs on, 589 

 of occlusion of coronaries upon, 



562 



of potassium upon, 570 

 of sodium upon, 570 

 electrical changes in, 541, 692 

 escape from inhibition, 585 

 events of a cardiac cyle, 556 

 fibrillary contractions, 563 

 historical account of beat of, 565 

 inhibition of auricle, 585 



of ventricle, 585 



intraventricular pressure during sys- 

 tole, 547 



intrinsic nerves of, 566 

 maximal contractions of, 573 

 musculature of, 533 

 myogenic theory of beat of, 567- 

 negative pressure in, 560 

 neurogenic theory of beat of, 566 

 rate of beat as affected by age, 596 

 by blood-pressure, 597 

 by intrinsic nerves, 597 

 by muscular exercise, 598 

 by sex, 596 

 by size, 596 

 by temperature, 599 

 reflex acceleration of beat, 593 



Heart, refractory period of, 575 



sequence of beat of, 576 



sounds of, 552 



suction-pump action of, 560 



systole and diastole of, 533 

 time relations of, 557 



systolic plateau of beat, 548 



theories of inhibition of, 589 



third sound of, 555 



tonic inhibition of, 587 



tonicity of muscle of, 579 



vasomotors of, 622 



ventricle of, in systole, 544 



ventricular output of, 549 



volume curve of, 549 



work done by, 557 

 Heart-block, 578 

 Heart-muscle, general properties of, 



58, 573 

 Heat centers, 957 



equivalent of foodstuffs, 936 



loss of, physiological regulation of, 

 953 



nerves, 957 



production in hydrolysis, 935 

 physiological regulation of, 955 



puncture, 958 



regulation, chemical, 957 

 general statement of, 953 

 physical, 954 



rigor of muscle, 53 



sexual, in lower animals, 968 

 Helmholtz theory of color vision, 361 

 Helweg's bundle, spinal cord, 181 

 Hematin, 427, 436 

 Hematoidin, 437 

 Hematopoietic tissue, 438 

 Hematoporphyrin, 437 

 Hemeralopia (night-blindness), 360 

 Hemianopia (quadrant), 211 

 Hemin, 436 

 Hemiplegia, 198 

 Hemochromogen, 426, 437 

 Hemodromograph, 484 

 Hemoglobin, absorption spectra of, 



compounds of, with carbon dioxid, 



429 



monoxid, 429 

 nitric oxid, 428 

 oxygen, 428 



condition of, in corpuscles, 420 

 crystals of, 430 

 curve of dissociation of oxyhemo- 



globin, 678 



derivative compounds of, 435 

 iron in, 429 



nature and amount of, 426 

 Hemolysins, natural and acquired, 423 

 Hemolysis, 421 

 Hemophags, 438 

 Hemophilia, 454 



