230 



EXPERIMENTAL PHYSIOLOGY 



Pulse-wave in man, 165 

 Purkinje-Sanson images, 210 



Rate of heart-beat, 98 



— of muscle-wave, 75 



— of work in simple twitch, 35 

 Recording cylinder, 24 



— tambour, 28 



— time, 22 

 Red-blindness, 225 

 Reed, vibrating, 60 

 Reflex action, 214 

 Reflexes, inhibition of, 217 



— irradiation of, 216 



— purposive character of, 216 

 Reflex time, 216 

 Refractory period of heart, 108 

 Relaxation period, 33 



Respiration, action of central end of 

 vagus, 206 



— action of the glossopharyngeal, 203 



— effect of swallowing upon, 203, 208 



— methods of recording, 201 



— result of section of the two vagi, 203 

 Respiratory movements, effect on blood- 

 pressure, 173 



Rheochord, 92 



Rhythm of heart, 102, 103 



effect of heat upon, 113 



Ritter's tetanus, 87 



Roots of nerve, functions of, 85 



Salivary gland, secretory nerves to, 212 



— secretion, 209 

 Sanderson's stethometer, 207 

 Sanson-Purkinje images, 219 

 Schemer's experiment, 220 

 Schema of the circulation, 157 



action of elastic tube, 161 



Sciatic nerve, effect of stimulation of, 



upon blood-pressure, 175 

 Secondary coil, 4 



— contraction, 148 

 Secretion of saliva, 209 

 Semimembranosus and gracilis prepara- 

 tion, 19 



Shunt of galvanometer, 150 

 Slowing of frog's heart by vagus, 123 

 Sphygmogram, 165 167 

 Sphygmograph, Dudgeon's, 166 



— Marey's, 164 



Spinal cord, study of reflex action in 



214 

 Spring chronograph, 24 



— key, 10 

 Staircase-effect, in heart, 105 



— — in muscle, 63, 69 

 Stannius ligature, the first, 104 

 the second, 128 



Stethogram, 208 



Stethometer, Sanderson's, 207 



Stimulation, unipolar, 28 



Stimuli for nerve, 86 



Stromuhr, 187 



Strychnine, action on spinal cord, 217 



Submaxillary gland, secretion by the, 

 209 



Submaximal excitation, 27 



Summation of muscular contraction, 56 



Superior laryngeal, action of, upon the 

 respiration, 202 



Supra -renal extract, effect upon blood- 

 pressure, 182 



Suspension method of recording heart- 

 beat, 98 



Swallowing, effect of, upon respiration, 

 203, 208 



Sympathetic, action on heart, 125, 126 



on submaxillary gland, 212 



— course of fibres to frog's heart, 121 



Tambour, 28, 29 



Temperature, influence of, upon a single 

 muscle-twitch, 44 



a single beat of the heart, 116 



upon the frog's heart, 112 



Tetanisation of frog's ventricle, 110 

 Tetanus, complete, 64 



— fatigue during, 70 



— genesis of, 59 



— Ritter's, 87 



Thermal stimulation of nerve, 86 

 Thickening of muscle during a twitch, 



71 

 Time, measurement of, 22 

 Tonometer, Roy's, 135 

 Trigger-key, 54 

 Twitch, simple, 30 



— thickening of muscle during a, 71 



— modified by fatigue, 67 



Unipolar excitation, 28 

 Unpolarisable electrodes, 83 



Vagus, action of central end upon re- 

 spiration, 206 



on heart, frog's, 122 



mammalian, 141 



— course of, to frog's heart, 120 



— effect of section upon respiration, 

 203 



— — of stimulation upon blood-pres- 

 sure, 177 



— inhibition, escape of heart from, 

 179 



Varnish for tracings, 32 



