LIST OF WOODCUTS. XV 



PAGE 



Go. Magnetic Induction 242 



66. Magnetic Induction 243 



67. Nerve-Terminations in the Muscles of a Guinea-Pig . . 245 



68. Ganglion-Cells from the Human Brain .... 266 



69. Graphical Representation of Muscle-Extension . . . 295 



70. Representations of Positive and Negative Values . . 296 



71. Action of Oblique Muscle-Fibres 297 



72. The Sciatic Nerve and Calf-Muscle of a Frog . . . 302 



73. Duration of Inductive Currents 305 



74. Helmholtz's Arrangement with a Sliding Inductive Appara- 



tus 307 



75A,JB,C. Secondary Pulsation from the Nerves . . . 315 



