1416 



INDEX 



Pylorus, opening of, 783 



by acid, 784 



Pyramidal cells of cortex, 483 

 decussation. 398, 412 

 tracts, 397, 413, 479 

 Pyrimidine, 115 

 bases, 876 

 nucleus, 115 

 Pyrogallol, 55 

 Pyrrol ring, 94 



synthesis of, 130 

 a-pyrrolidin carboxylic acid, 94 

 Pyruvic acid, 53, 861 

 origin of, 861 



QUADRI-URATES, 1249 



Quellung, 168 



RACEMIC compounds, 57 

 Radius of curvature, formula for, 601 

 Rami communicantes, 522 

 Ranvier's nodes, 281 

 Reaction, bimolecular, 181 

 monomolecular, 181 

 velocity of, 180, 181 

 of degeneration, 303 

 time, 515 



methods, 517 

 reduced, 516 

 variation of, 518 

 for hearing, 518 

 for sight, 518 

 Reactions, balanced, 185 



reversible, 185, 188 

 Recapitulation, Law of, 13 

 ' Receptor ' substance, 312 



action of adrenalin on, 314, 1324 

 Recessive characters, 1359 

 Reciprocal innervation from cortex, 494 

 of antagonistic muscles, 



379 

 Recording instruments, inertia of, 20, 



1009, 1011 

 Recti muscles, 653 

 Red-blindness, 646 



corpuscles, see Blood 

 marrow, 941 

 nucleus, 425, 431 

 'Red reflex' 618 

 Reduced eye, 593 

 Reduction, 174 

 Referred pain, 531 

 Reflex action, Bahnung, 344 

 block in, 343 

 delay in, 341 

 facilitation of, 344 

 fatigue of, 343, 388 

 general characters of, 341 

 inhibition of, 344 

 in spinal animal, 372, 374 

 isolation of, 385 

 localisation, 341 

 rebound, 388 

 reinforcement, 385 

 resistance, 343 



successive spinal induction, 388 

 summation, 342 



Reflex arc, 198, 333 



fatigue, 388 

 inhibition, 383 

 movements, 197 

 scratch-, 387 

 time, 342 

 tone, 448 



Reflexes, antagonistic, 387 

 prepotency of, 387 

 reinforcement of, 385 

 scratch area, 387 

 Refraction at surfaces, 590 

 in schematic eye, 591 

 Refractive indices in eye, 592 

 Refractory period, 306, 307 

 Regnnult and ReiseCs respiration appa- 

 ratus, 690 



Reissner^s membrane, 574 

 Remaps ganglion, 1058, 1060 

 Renal excretion, 1240-1298 

 mechanism, 1285-1288 

 Rennin, 772 



Reproduction, 1341-1393 

 in man, 1361-1393 

 in metazoa, 1344 

 in protozoa, 1342 

 Reproductive organs, development of, 



1361 



female, 1366 

 male, 1364 

 Residual air, 1170 

 Resonants, 586 

 Resonators, 565 

 Resorcinol, 55 

 Respiration, 1162-1239 



apparatus, Benedict's, 690 

 Haldane's, 689 

 Pettenkofer's, 691 

 RegnauU and Reiset, 690 

 Zuntz and Oeppert, 692 

 chemistry of, 1172-1199 

 effects of changes in air on, 1225-1 232 

 effect on circulation, 1054 

 of deglutition on, 764 

 of division of vagi, 1215 

 rate of, 1164 



reflex regulation of, 1214-1224 

 movements, co-ordination of, 1200 

 ' Respiration of swallowing,' 760 

 Respiratory centre, 1201 



automaticity of, 1202; 

 chemical excitants of, 



1203-1205, 1213 

 inhibitory action of vagus 



on 1218 

 spinal, 1202 

 stimulation of, by acids, 



1213 

 by oxygen lack, 



1208 



exchange, total, 689 

 movements, chemical regulation of, 



1204-1214 



Head's method, 1215 

 mechanics of, 1162-1171 

 regulation of, 1200-1224 

 muscles, 1166 



