INDEX. 





fluence on respiration of, 470; on the 

 circulation, 4H1 



Nerve-endings, specific terminal organs 

 of, for tastes, 1():>4; for pressure, 1".'.7; 

 cutaneous, 1054; for heat and cold, 

 1054 



Nerve-fibres, efferent and afferent, 141, 

 143; revehent, 14l> ; in spinal cord, 14.'!; 

 medullated and non-medullated, 147 ; 

 vaso-constrictor and vaso-<lilaior, 'jr>!t; 

 vaso-constrictor, course of, 273; vaso- 

 dilator, course of, 27."> ; inhibitory and 

 augnientor, 2.~>0; secretory and trophic, 

 :^1 ; nutrition of, IJ71) 

 Nervi erigentes, vase-dilator fibres of, 

 278; action of, on the rectum, 385; ac- 

 tion on penis, and roots of, 1116 

 Nervous system, central, centres for 

 automatic and reflex actions in, 143, 

 144; vaso-motor functions of, 277, 282; 

 regulation of temperature by the, 645, 

 647 ; metabolism governed by the, fi">4 



mechanism, coordinating, 702, 729, 



737, 956 



Neurin in nervous tissue, 105 

 Neuroglia, of white and grey matter of 



cord, (100 



Neurokeratin in nerve medulla, 106 

 Newt, chief cells of gastric glands in, 346 

 Nitrogen in proteids, 17; in expired air, 

 441 ; relations of, in the blood, 461 ; 

 free, inassimilable by living beings, 023 

 Nitrogenous waste not increased by 

 muscle contraction, 95, 97 ; equilibrium, 

 626 



" Noeud vital " of Plourens, 473 

 Noises and musical sounds, 998; char- 

 acters of, 1002 



Nostrils, their work in inspiration, 438 

 Notch, dicrotic, in pulse tracings, 231 

 Notes, how produced vocally, 1075, 1084 

 Nuclein, in white corpuscles, 38; a modi- 

 fied proteid, 41 ; a constituent of milk, 

 (ilti; of semen, 1115 



Nutrition, statistics of, 619; income and 

 output of material in, 622 ; summary of 

 phenomena of, 651 ; of muscle, 652 ; of 

 muscle increased by activity, 128; in- 

 fluences determining, 654 ; nervous 

 control of, 654, 707 ; disordered, phe- 

 nomena of, 65ti; of nerve-fibres, 679; 

 of embryo, 1123, 1128 



Odours, perception of, 1025 ; discrimina- 

 tion of, 1026 



(Edema, possible causes of, 390, 400; in- 

 flammatory, 410; of Bright's disease, 

 411 



(KsMpliauus. movements of in deglutition, 

 376; force of contract imi in the, ib. 



Oil, clotting of blood prevented by 

 presence of, 21 



Old age, phenomena of, 1151 ; degenera- 

 tions characteristic of. 1 l.vj 



Olfin, presence of, in blood, 47; a con- 

 stituent of animal fat. 'XNi 



Olfactory bulb and tract, sensations, 

 Hr_'.-.; judgments. lr_'7 



Oncograph, renal, .~>-'7 



Oncometer, renal, 526, 830 



Ophthalmoscope, principle of the, 926 



Optic chiasnia, 7H4 



lobes, results of removal in frog, 



737 



nerve, its decussation in chiasma, 



785; an extension from the braii 

 ojiticcup, .S.'Ki; fibres, their insensibility 

 to light, iH7, ltt->2 



thalami, results of removal in frog, 



737 



Optical systems, simple and complex, 

 840 



Optogram, how obtainable, 924 



Ora serrata, 838 



Oflcal by rice, its mode of action, 335 



Organs, definition of, 8; terminal, for 

 sensations of touch and temperature, 

 1051 ; for sensations of pressure, 1054 ; 

 for sensations of heat different from 

 those for sensations for cold, 1055; 

 nature of, 1057 



Organs of reproduction, female, 1111- 

 1113; male, 1114-1118 



Os uteri, expansion of during ' labour,' 

 1137 



Ossicles, auditory, 986; attachments of, 

 986 ; conduction of vibrations through, 

 989 



'Output' of blood by ventricle, I'.'T ; 

 increased by augiuentor action, 256 



Ovum, escape of the, 1111 ; transference 

 to the uterus, 1111; impregnation of 

 the. 1119; nutrition of, in the uterus, 

 1123 



Oxidation in the tissues, seat of, 469 



Oxygen, its absorption by the living 

 body, 2; borne by the blood to the 

 tissues, 13; in proteids, 17; borne by 

 hiemoglobin, 32-35, 461 ; its entrance 

 to ths blood by diffusion, 424; in air 

 expired and inspired, no ; relative pro- 

 portions of in arterial and venous blood, 

 443; varying amounts of in venous 

 blood, 447; relations of in the blood, 

 447 ; absorption of, by blood not ac- 

 cording to 'law of pressures,' 448; 

 its access in the lung to the corpuscle. 

 463: its relations in laboured breathing 

 and asphyxia, 465; mode of storage in 

 muscle tissue, 468; effect on respira- 

 tion of deficiency of, 487; effect of 

 breathing. 4!":: : results of high pressure 

 of, 496; mode of measuring amount 

 consumed, 623; consumption of, as af- 



