xvi LIST OF ILLUSTRATIONS 



68. Photomicrographs showing the Effect of Pregnancy on the 



Brain-cells of a Cat 276 



69. Tracing showing Effect of Pregnancy on the Adrenin Out- 



put of a Cat 277 



70. Photomicrographs showing Effect of Eclampsia on the 



Brain-cells of a Human Being 281 



71. Photomicrographs showing Comparison between the Effects 



of an Acid arid of an Alkali on the Brain-cells of Cats 290 



72. Photomicrographs showing Comparison between the Effects 



of an Acid and of an Alkali on the Adrenals of Cats . 291 



73. Photomicrographs showing Comparison between the Effects 



of an Acid and of an Alkali on the Liver of Cats . . 292 



74. Photomicrographs showing Protective Effect of Morphin 



and of Nitrous Oxid on the Brain-cells of Dogs which 



had Received Diphtheria Toxin 294 



75. Photomicrographs showing Protective Effect of Morphin 



and of Nitrous Oxid on the Adrenals of Dogs which 



had Received Diphtheria Toxin 295 



76. Photomicrographs showing Protective Effect of Morphin 



and of Nitrous Oxid on the Livers of Dogs which had 

 Received Diphtheria Toxin ...... 297 



77. Cross-section of Leaf and Hair of Venus' Fly-trap . . 299 



78. Resemblance between Certain Microscopic Structures in the 



Eye and Certain Structures in the Brain . . . 304 



79. Sleeping Child 315 



80. Laughter of a Healthy Child 329 



81. Baseball Fans at a Championship Game .... 334 



82. Crying Child 336 



83. Photomicrographs showing the Protective Effect on the 



Brain-cells of a Dog of Injections of an Alkali after 

 Double Adrenalectomy 347 



84. Photomicrographs showing the Protective Effect on the 



Liver of a Dog of Injections of an Alkali after Double 

 Adrenalectomy 348 



85. Photomicrographs showing the Effect of Acute Acidosis on 



the Brain-cells of a Human Being .... 3."><) 



86. Photomicrographs showing the Effects of Extreme Activa- 



tion on the Brain-cells of a Soldier .... 352 



87. Photomicrographs showing the Effects of Extreme Activa- 



tion on the Adrenals of a Soldier 3">3 



88. Photomicrographs showing the Effects of Extreme Activa- 



tion on the Liver of a Soldier : > : 'l 



