LIST OF ILLUSTRATIONS. Xlll 



FIG. PAGE 



90. Simple rheochord. (Stirling.) ........ 163 



91. Simple rheochord. (Stirling.} , 164 



92. Rheochord, Oxford pattern. (Stirling.) 165 



93. Reverser. (Elliott.) 165 



94. Du Bois Reymond induction coil. (Elliott.) 166 



95. Ewald's sledge coil. (Hurst.) 168 



96: Vertical iriductorium ..... . 169 



97. Hand-electrodes. (Stirling.) 169 



98. Du Bois electrodes 170 



99. Induction coil for single shocks. (Stirling.) 171 



100. Du Bois coil 173 



101. Break extra-current. (Stirling.) 173 



102. Helmholtz's modification 174 



103. Equalised^ make and break shocks. (Stirling.) 175 



104. Brodie's rotating key 175 



105. Frog's leg-muscles. (Ecker.) 178 



106. Frog's sciatic nerve. (Ecker.) ........ 178 



107. Nerve-muscle preparation ......... 180 



108. Straw-flag. (Stirling.) 181 



109. Scheme for single induction shocks. (Stirling. ) .... 183 



no. Scheme of constant current. (Stirling.) 185 



in. Frog's sartorius and thigh muscles. (Ecker.) 186 



112. Rheonom. (Stirling.) 188 



113. Pohl's commutator. (Elliott.) 193 



114. Scheme of curare experiment ........ 194 



115. Revolving cylinder of Ludwig ........ 195 



1 16. Scheme of moist chamber. (Stirling. )...... 197 



117. Record of make and break contractions. (Stirling.) .... 199 



118. Muscle curve. (Stirling.) 200 



119. Crank my ograph. (Stirling.) 201 



120. Arrangement for automatic break. (Stirling.) 202 



121. Simple muscle curve. (Stirling.) 204 



122. Isotonic and isometric muscle curves. (Gad.) 204 



123. Scheme of Fick's tension recorder. (Schenk.) 205 



124. Apparatus for heat- rigor. (Ludwig.) ...... 206 



125. Pendulum -my ograph ......... 207 



126. Pendulum-myograph curve. (Stirling.) 208 



127. Spring-my ograph 208 



128. Revolving drum for time relations of muscle curve .... 209 



129. Electric signal. (Stirling.) 210 



130. Chronograph. (Cambridge Scientific Instrument Co.) . . . 210 



131. Chronograph writing horizontally. (Marey.) 211 



132. Simple myograph. (Marey.) 211 



133. Myograph. (Fredericq.) 212 



134. Effect of temperature on muscle curve. (Stirling.) .... 213 



135. Muscle curve with load. (Stirling.) 214 



136. Veratria curve. (Stirling.) 215 



137. Veratria curve. (Stirling.) 215 



138. Elasticity of a frog's muscle. (Stirling.) 217 



139. Elasticity of india-rubber. (Stirling.) 217 



