228 



EXPERIMENTAL PHYSIOLOGY 



Digitalin, action on mammalian heart, 

 143 



on kidney, 198 



Direct excitation, 18 



— vision, 225 



Du Bois-Beymond's key, 11 



Dudgeon's sphygmograph, 166 



Dyspnoea, effect upon blood-pressure, 182 



Electrical stimulation of nerve, 87 

 Electrodes, polarisation of, 81 



— simple flexible, 106 

 wire, 26 



— unpolarisable, 83 

 Electrometer, capillary, 154 

 Electro-physiology, 146 

 Electrotonus, 88 

 Engelmann's experiment, 81 

 Excitability, changes of, in electro- 

 tonus, 88 



— independent muscular, 76 

 Excitation, direct and indirect, 18 



— maximal and minimal, 26 



— polar, of muscle, 80 



— — of nerve, 90 



— unipolar, 28 

 Extra-current, causation of, 6 



— break, 14, 19 



— make, 19 



Fatigue of muscle, changes in height 



of twitch, 69 



study of, 66 



Fick's manometer, 183 



Field of vision for colour, 227 



Force, absolute, of muscle, 52 



— of heart-beat, decrease of, by vagus, 



122 

 increase of, by sympathetic, 



127 

 Forceps, muscle, 25 

 Friction-key, 11 



Galvani's experiment, contraction with 

 metals, 147 



without metals, 147 



Galvanometer, 149 



Gastrocnemius preparation, 16 



Genesis of tetanus, 59 



Glosso-pharyngeal, action on respira- 

 tion, 203 



Gracilis and semimembranosus pre- 

 paration, 19 



Graphic method, 21 



Green blindness, 225 



Grenet battery, 2 



Grove batterv, 3 



Heart (frog's), anatomy of, 97 

 — action of atropine on, 131 



■ muscarine on, 130 



— nicotine on, 133 



pilocarpine on, 131 



— — temperature, 112 



currents of, 153 



current of action of, 149 



excision of, 101 



■ Luciani's groups, 137 



— ■ minimal stimulus causes maximal 

 contraction, 105 



— nerves of, 120 



— plethysmography record of, 135 



— rate of beat, 98 



— record of beat, 98 



— rhythm of, 102, 103 



— stimulation of crescent, 125 



Heart (mammalian), action during 

 asphyxia, 144 



of caffeine on, 143 



— ■ — of digitalin on, 143 



of neurine on, 144 



of vagus on, 141 



— recording movements of, 140 

 Helmholtz modification, 9 

 Helmholtz's phakoscope, 219 

 Holmgren's worsteds, 224 

 Hiirthle's manometer, 184 

 Hyoglossus preparation, 20 



Images formed by reflection from curved 



surfaces, 218 

 Independent muscular excitability, 76 

 Inertia, effect of, on single twitch, 37 

 Impulse, nervous, velocity of, 94 

 Indirect excitation, 18 



— vision, 225 

 Induction coil, 4 



Inhibition of frog's heart by vagus, 

 123 



— of heart by muscarine, 130 



— of reflexes, 217 

 Injection, intravenous, 181 

 Injury, current of, 151 

 Irradiation of reflex movements, 216 

 Irritability, independent muscular, 77 

 Isometric contraction, 39 



— lever, 40 



— muscle-curves, 41 

 Isotonic contraction, 39 



Katelectrotonus, 88 

 Kathodic contraction, 80 

 Key, break, 30 



— cut-out, 13 



— du Bois, 11 



— friction, 11 



