LIST OF ILLUSTRATIONS. XV 



FIG. PAGE 



76. Marey's Tambour, 184 



77. Wild's Apparatus (Stirling), 185 



78. Galvanometer, 187 



79. Lamp aud Scale, . . 188 



80. N.P. Electrodes, 189 



81. Shunt, 189 



82. Apparatus for Muscle Current (Stirling), . . . . .190 



83. Nerve N.P. Electrodes, 193 



84. Galvani's Experiment (Stirling), . . . . ' . .194 



85. Secondary Contraction, ........ 195 



86. Scheme of 85 (Stirling), 196 



87. Paradoxical Contraction (Stirling), ...... 196 



88. Kiihne's Experiment (Stirling), 197 



89. Electrotonus (Stirling), 198 



90. Electrotonus, 200 



91. Scheme of 90 (Stirling), 200 



92. Pfluger's Law (Stirling), 202 



93. Velocity of Nerve Energy, 204 



94. Unequal Excitability of a Nerve (Stirling), .... 206 



95. Kiihne's Experiment (Kilhne}, 207 



96. Frog's Heart, 209 



97. 209 



98. Frog's Vagus (Stirling), 216 



99. Vagus Curve (Stirling), 217 



100. Frog's Sympathetic (after GasJcell), 219 



101. Frog's Heart Support (Stirling), 220 



102. Staircase of the Heart, 221 



103. Double Cannula, 223 



104. Heart Apparatus, 225 



105. Tonometer, 226 



106. Gaskell's Clamp (Stirling), . . . . . . .228 



107. Cardiograph, 232 



108. Marey's Sphygmograph, ........ 234 



109. Dudgeon's Sphygmograph (Maw Son & Thompson), . . . 235 

 109a.Ludwig's Sphygmograph (Petzoldt), 235 



110. Sphygmoscope (Rothe) 236 



111. Rheometer, 240 



112. Kries's Apparatus, 245 



113. Lymph-Hearts. . 245 



114. Stethograph, 248 



115. Muller's Valves (Stirling), . -" 250 



116. Heywood's Experiment (Stirling), .251 



