1 6 LIST OF ILLUSTRATIONS. 



FIG. IV-. OF 



62. SCHEMA OF THE ARRANGEMENT OF NERVE CELLS 



IN THE CENTRAL SYSTEM (SCHAFER, QUAIN's 

 "ANATOMY'"; 279 



63. RECORD OF THE DISCHARGE FROM THE CEREBRAL 



CORTEX (GOTCH AND HORSLEY) 282 



64. RECORD OF THE KNEE-KICK OF A DEMENTED PATIENT, 



SHOWING SLEEP INTERVAL (NOYES) 286 



65. RECORD OF RE-ENFORCEMENT OF THE KNEE-KICK 



(LOMBARD) " 287 



66. PLETHYSMOGRAPHIC RECORDS FROM THE ARM OF A 



SLEEPING PERSON (BARDEEN AND NICHOLS) ... 289 



67. PLETHYSMOGRAPHIC RECORD FROM THE ARM OF A 



SLEEPING PERSON ; VARIATION CAUSED BY MUSIC- 

 BOX (BARDEEN AND NICHOLS) 289 



68. HEIGHT OF THE KNEE-KICK ACCORDING TO THE TIME 



OF REINFORCEMENT (BOWDITCH AND WARREN) ... 29! 



69. TEMPERATURE CURVES ; SHOWING DIURNAL VARIA i | 



(JURGENSEN AND JAGER) 298 



70. RECORDS OF THE PERIODIC LOSS OF POWER OCCURRING 



IN A SERIES OF VOLUNTARY CONTRACTIONS (LOM- 

 BARD) ... ... ...' ..." ... 300 



71. DIURNAL VARIATION OF VOLUNTARY MUSCULAR POWER 



(LOMBARD) 301 



72. CURVE ILLUSTRATING STRENGTH OF THE AUDITORY 



STIMULUS NECESSARY FOR AWAKENING A PERSON 



' AT DIFFERENT HOURS OF THE NIGHT (jtOHHL- 



SCHUTTER) -. ... 315 



73- FATIGUED GANGLION CELLS AS COMPARED WITH THOSE 



AT REST. SPINAL GANGLION CSVT (HODGE) ... 317 



74. CURVE ILLUSTRATING SHRINKAGE OF THE NUCLEI OF 



THE NERVE CELLS UPON STIMULATION AND SUB- 

 SEQUENT EXPANSION DURING PERIODS OF REST 

 (HODGE) 319 



75. CAMERA DRAWINGS OF A NERVE CELL UNDERGOING 



CHANGES DUE TO STIMULATION* (HODGE) 320 



76. CURVES TO ILLUSTRATE DECREASE OF WEIGHT IN THE 



ENCEPHALON AS THE RESULT OF OLD AGE (BlS- 

 CHOFF) 325 



77. COMPARISON OF OLD AND YOUNG NERVE CELLS IN 



MAN AND BEE (HODGE) 330 



