284 



EXPERIMENTAL PHYSIOLOGY. 



Purkinje figures, 165 

 images, 156 



Radial pulse, 94 

 Rapid kymograph, 23 

 Reaction time in man, 106 

 Reciprocal inhibition, 251 



innervation, 245 

 Red muscle fibres, 38 

 Reflection, laws of, 139 

 Reflex, accommodation, 155 



acoustic, 249 



action in frog, 98 



action in mammal, 239 



control of circulation, 199 



deglutition, 249 



extensor thrust, 240 



fatigue, 241 



flexion, 240, 249, 256 



head shake, 249 



palpebral, 104 



pinna, 248 



postural tonus, 250 



control of respiration, 199 



scratch, 240 



summation, 241 



time 240 



time in frog, 99 



time, in man, 106 

 Reflexes, spreading of, 99 



inhibition of, 101 

 Refraction by a convex lens, 145 



errors in, 149 



in the eye, 146 

 Refractive index, 143 

 Refractory period in the heart, 68 

 Removal of paper from drum, 12 

 Resistance of nerve to fatigue, 57 

 Respiration, 107 



reflex control of, 199 

 Respiratory exchange in man, 118 



movements, influence of, on pulse 

 97 



quotients, 279 



quotients, calculation of, 120 

 Response of retina to light, 167 

 Resuscitation by transfusion with 



epinephrin, 205 



Retina, effects on, of stimulating with 

 two different colours, 171 



structure of, 163 



response to light, 157 

 Retinoscope, 161 

 Rheoscope, nerve muscle as a, 40 

 Rhythmicity of smooth muscle, 43 

 Rigor mortis, 39 



Salivary glands, innervation of, 226 

 Saliva, secretion of, 231 

 Scheiner's experiment, 157 

 Schematic eye, 147 



Sciatic stimulation, effect on respira- 

 tion, 199 



Scratch reflex, 240, 256 

 Secondary circuit, 10 

 Secretin, influence of, on pancreatic 



secretion, 230 

 Secretion of bile, 228 

 of gastric juice, 233 

 of pancreas, 228 

 of saliva, 231 



of submaxillary gland, 226 

 Semilunar valve, effect of damaging, 



223 



Semipermeable membranes, 263 

 Sensations, skin, 192 

 Sherrington electrodes, 237 

 Simple contractions, 22 

 Simultaneous action on the retina of 



three primary colours, 173 

 Skin sensations, 192 

 Smoking paper, 12 

 Smooth muscle, 42 

 Sodium chloride, influence of on lymph 



flow, 221 

 Sodium ions, action of, on cardiac 



muscle, 62 



Sound waves, diagrams, 183, 184 

 Sodium nitrite, effect of, on blood ves- 

 sels of the frog, 77 

 Sound waves, transmission of, in the 



ear, 185 



Space and depth, judgments of, 178 

 Special senses, 139 

 Spherical aberration, 149 

 Sphygmic period, 96 

 Spinal cat, 255 

 Spinal nerve roots, function of, frog, 102 



functions of mammal, 245, 250 

 Spirometer, Tissot-Carpenter, 118 

 Splanchnic nerve stimulation effect on 



blood pressure, 83 

 stimulation, effect of, on kidney 



"volume," 202 

 Spreading of reflexes, 99 

 "Staircase" effects, 33 

 Stannius ligature, 65 

 Stereoscopic vision, 181 

 Stewart's calorimeter method for meas- 

 urement of blood flow, 210 

 Submaxillary gland, secretion of, 226 

 Summation of inadequate stimuli, 48 

 of smooth muscle, 43 

 from two stimuli, 35 



