1052 



INDEX. 



Nerve-impulse, relation of, to action 

 current, 105, 113 



theories of, 119 



velocity of, 110 

 Nervi erigentes, 256, 621, 640 

 Nervous secretion, gastric, 783 



pancreatic, 797 

 Neurogenic theory of heart-beat, 570 



tonus, 56 



Neuron doctrine, 129 

 Neurons, varieties of, 131 

 Nicotin, action of, on salivary secre- 

 tion, 768 

 on sweat secretion, 870 



use of, in tracing autonomic fibers, 



254 



Night-blindness, hemeralopia, 360 

 Ninhydrin reaction for protein, 1028 

 Ninth cranial nerve, nucleus of, 249 

 Nissl's granules, 134 

 Nitric oxid hemoglobin, 430 

 Nitrogen, condition of, in blood, 681 



determination of, 900 



equilibrium, 899 



effect of non-protein food on, 902 



excretion in urine, 851 

 Nitrogenous extractives of muscle, 64 

 Nodal point of eye, 312 

 Non-polarizable electrodes, 100 

 Norleucin, 800 

 Normoblasts, 440 

 Nuclease, 756 



Nucleo-albumin in bile, 824 

 Nucleoproteins, 1031 



in blood, 453 



intermediary metabolism of, 858 



OBESITY, physiological cause of, 928 

 Ohm's law of composition of sound 



waves, 397 

 Olfaction, end-organ for, 299 



mechanism of, 300 

 Olfactometer, 304 

 Olfactory associations, 305 



bulb, histological structure of, 217 



center in cortex, 216 



nerve, course of fibers of, in brain, 

 218 



organs, fatigue of, 303 



sensations, classification of, 301 

 conflict of, 305 

 qualities of, 301 

 threshold stimulus, 303 



sense cells, 300 



stimuli, nature of, 301 

 Oncometer, 847 

 Oocytin, 994 

 Oogonia, 991 

 Ophthalmometer, 334 

 Ophthalmoscope, 331 

 Opotherapy, 873 



Opsonins, 445 



Optic chiasma, decussation in, 209 

 nerve, course of fibers of, in brain, 



208 



radiation, 209 

 thalamus, functions of, in vision, 



212 

 tracts, structure of, 209 



Optical deceptions, 382 



Optograms on retina, 339 



Orokinase, 771 



Orthodiagram, 549 



Orthodiagraph, 549 



Osmosis, definition of, 1032 



Osmotic pressure, definition of, 1033 

 determination of, 1035 

 of blood, 423 



Oval field of Flechsig, 180 



Ovaries, internal secretion of, 894 

 relation of, to menstruation, 986 



Overtones, production of, 397 



Ovulation, 982 



Ovum, fertilization of, 992 



implantation of, in uterus, 994 

 maturation of, 990 

 passage of, into uterus, 989 



Oxalate solutions, effect of, on coagu- 

 lation, 468 



Oxalated plasma, 465 



Oxidases, 754, 973 



Oxidations, theories of, 973 



Oxygen, action of, on respiratory 



center, 702, 711 



compound of, with hemoglobin, 429 

 condition of, in blood, 681 

 effects of varying pressures of, on 



respiration, 711 

 potassium ferricyanide method of 



determining, 676 

 tension of, in alveolar air, 686 

 in tissues, 688, 689 

 in venous blood, 686 



Oxygenase, 976 



Oxygen-pressure of blood, 690 



Oxyhemoglobin, 429 



Oxyprolin, 801, 1025 



Oxyproteic acid, 853 



Oxypurins, 857 



PACCHIONIAN bodies of brain, 631 

 Pain sense, distribution and charac- 

 teristics of, 286 

 localization of, 287 

 path for, in cord, 174 

 Pains, hunger-, 731 

 Pale fibers of muscle, 19, 26 

 Pancreas, action of lipase in, 803 

 anatomy of, 793 

 curve of secretion of, 795 

 digestive action of secretion, 798 

 on carbohydrates, 803 



