INDEX. 



1335 



Plethysmograph, principles of its action, 

 174, 178, 1%; amount of blood in parts 

 determined by, 270 ; for kidney meas- 

 urements, 525; for measurement of 

 blood-supply to brain, 830 



Pleural cavity, result of access of air to 

 tbe, 426 



Plexus, brachial, constrictor and dilator 

 fibres in, 271 



Pneumatograph of Fick, 431 



Pneumograph, Marey's, 430; tracing of 

 respiratory movements by, 432 



Polarizing current, irritability of nerve 

 affected by, 112-114 



Posture, erect, how maintained, 1102 



Potassium salts in cell tissue, 39,47; in 

 muscle tissue, 90, 91 ; in urine, 516 



Predicrotic wave, its causes, 235 



Pregnancy and birth, 1119-1143 



Pressure, arterial, as compared with 

 venous, 154, 159; as affecting pulse 

 tracings, 223; heart-beat in inverse 

 ratio to, 261; blood, in the small ves- 

 sels, peripheral region, 161, 168; flow 

 of lymph regulated by, 403^409; en- 

 docardiac, 191 ; graphic records of, 193- 

 199; negative during each cardiac 

 cycle, 192, 193; how produced, 201 

 auricular and ventricular compared 

 182, 193; of salivary secretion, 337 

 of bile secretion, 369; pulmonary, 427 

 thoracic, 431 ; thoracic, negative, 500 

 partial, of gases, 448; absorption of 

 oxygen, dependent on, 462; results 

 of, 496 ; atmospheric, effect of diminu- 

 tion of, 494 ; increase of, 496 ; of car- 

 bonic acid in pulmonary alveoli, 466; 

 within the bladder, 547 ; intra-ocular, 

 conditions affecting, 975 ; sensations 

 of, 1037 ; modified by temperature, 

 1055 ; sensibility of skin to changes of, 

 1039, 1056 



Pressures, Henry-Dalton law of, 449 



Primordial utricle, 4 



Processus vocalis, and muscularis, 1075 



Proteids, general composition of, 17; 

 changes in, produced by alcohol, 24; 

 in food-stuffs, 311; action of gastric 

 juice on, 321; of pancreatic juice on, 

 359; classification of, in order of 

 solubility, 322; path taken by, during 

 digestion, 415 ; a source of fat, 608 ; 

 metabolism of body increased by, 617 ; 

 disruption of, during digestion, 626; 

 probable molecular composition of, 

 361 ; possible storage of, in the body, 

 627 ; " tissue," or morphotic and 

 " floating " or circulating, 627 



Proteid material, a constituent of living 

 matter, 41 ; potential energy of, ex- 

 pressed in calories, 633; the pivot of 

 metabolism, 654 



Protoplasm, definition of, 4; "differen- 

 tiated," 4; undifferentiated in the 

 embryo, 37 



Pseudopodia of the white corpuscles, 

 amoeboid movements by means of, 137 



Psychical processes, analysis of, 821; 

 duration of, 823; visual, complexity 

 of, 961 



Ptomaines, their bacterial origin, 394 



Ptyalin, a constituent of saliva, 318 



Puberty, phenomena of, 1150 



Pulse, the, 153, 219 ; methods of record- 

 ing, 219-223 ; artificial, 223, 227 ; char- 

 acters of, 227; disappearance of, 228; 

 dicrotism in, 230-236; anacrotic, ib.; 

 venous, 236 ; venous, respiratory, 237 



Pulse-volume, 200, 217 



Pulse-wave, changes of, in the arteries, 

 227; velocity of the, 229; length of 

 the, ib. 



Pulvinar, the, ending of part of the optic 

 tract in, 787 



Punctum lachrymale, 978 



Puncture of pleura, result of, 426 



Pupil, the, see Eye, pupil 



Purkinje', figures of, 917 



Purple, visual, 922; bleaching of by 

 light, 923 



Pus corpuscles, their formation, 43 



Pylorus, ejection of chyme through the, 

 389 



Pyramidal tract of cord, 686; efferent 

 nature of impulses of, 753; not indis- 

 pensable for voluntary movements, 772 



Pyramids of the bulb, decussation of, 758 



Pyrexia, causes of, 648 



Eadial artery, tracings of the pulse in, 

 221-223, 226, 231 



Radical, lacteal, contents of, 418 



Ranke's diet table, 633 • 



Reaction-period, subdivision of, 819 ; for 

 vision, 881 



Rectum, nervous control of movements 

 of, 385 



Recurrent sensations, 937 



Reflex actions, general features of, 144- 

 146 ; doubtful if carried out by ganglia, 

 144; not always proportioned to 

 stimulus, 145 ; often purposive in char- 

 acter, 146 ; vaso-motor, 277 



actions of the cord, 698 ; features of 



dependent on afferent impulses, 698; 

 nervous mechanisms of, 699; their re- 

 lations to intelligence, 701 ; coordina- 

 tion of, 702; determined by intrinsic 

 condition of cord, 703; other than 

 movements, 707 ; inhibition of, 705 ; in- 

 hibitory action of the brain on, 708; 

 time required for, 709 



Regeneration of organs in lower animals, 

 1109 



