ILLUSTRATIONS XXV11 



FIG. PAGE 



67. Tracing to show that vagus stimulation may facilitate transmission from 



auricles to ventricles 225 



68. Diagram to show the innervation of the heart in the frog or turtle. (Color 



Plate.) 228 



69. Frog heart tracing showing the action of nicotine 231 



70. Schematic representation of the innervation of the heart of the mammal. 



(Color Plate.) .' 232 



71. Tracings showing the effects on the heartbeat of the frog resulting from 



stimulation of the sympathetic nerves prior to their union with the vagus 



nerve 233 



72. Boy's kidney oncometer 235 



73. Pall of blood pressure from excitation of the depressor nerve 244 



74. The effect of strong stimulation (heat) of the skin of the foot on the ar- 



terial blood pressure and respiratory movements 245 



75. Diagram showing the probable arrangements of the vasomotor reflexes . . 246 



76. Aortic blood pressure, showing the effect of posture 249 



77. Tracing to show the effect of gravity on the arterial blood pressure . . . 250 



78. The effect of gravity on the aortic pressure after division of the spinal cord 



in the upper dorsal region 250 



79. Capillaries from abdominal wall of guinea pigs after injection of india ink . 252 



80. Tracing showing simultaneous records of the arterial blood pressure, the 



venous pressure, the intracranial pressure, the pressure in the venous 



sinuses 260 



81. Electrocardiographic apparatus as made by the Cambridge Scientific Ma- 



terials Co. . 271 



82. Normal electrocardiogram 272 



83. Electrocardiogram (dog) taken simultaneously with curves from auricle and 



ventricle 273 



84. Records of electrocardiogram and movement of ventricle of frog showing that 



when the apex is warmed a typical T-wave appears in place of a wave 



in the opposite direction appearing when the apex is cooled ...... 275 



85. Sinus bradycardia 279 



86. Auricular extrasystole '. 279 



87. Ventricular extra systoles arising in the right ventricle 279 



88. Ventricular extrasystole arising in the left ventricle 279 



89. Paroxysmal tachycardia 280 



90. Auricular fibrillation . . 280 



91. Auricular flutter 282 



92. Delayed conduction 282 



93. Partial dissociation 283 



94. Complete dissociation 283 



95. Tracings of the jugular pulse, apex beat, carotid and radial pulses .... 286 



96. Polysphygmograph 288 



97. Normal jugular tracing 288 



97A. Superimposed pressure curves from aorta, ventricle and auricle, along Avith 



electrocardiogram and phonocardiogram 289 



98. Polysphygmograms including jugular, apex and radial tracings 290 



99. Delayed conduction 291 



100. Dropped beats . ,, . , 292 



