XIV 



FIGURB PA<JB 



28. Photomicrographs showing the Effect of Exertion on the 



Adrenals of a Cat 170 



29. Photomicrographs showing the Effect of Exertion on the 



Liver of a Cat 171 



30. Photomicrographs showing the Effect of a Long Swim on 



the Brain-cells of a Salmon 172 



31. Photomicrographs showing the P^ffect of a Long Swim on 



the Adrenals of a Salmon . ' 173 



32. Photomicrogi-aphs showing the Effect of a Long Swim on 



the Liver of a Salmon 174 



33. Photomicrographs showing the Effect of Indol and Skatol 



on the Brain-cells of a Cat 175 



34. Photomicrographs showing the Effect of Indol and Skatol 



on the Adrenals of a Cat ...... 176 



35. Photomicrographs showing the Effect of Indol and Skatol 



on the Liver of a Cat 177 



36. Photomicrographs showing Effect of Carcinoma on the 



Brain-cells of a Human Being 178 



37. Photomicrographs showing Effect of Paratyphoid Fever on 



the Brain-cells of a Human Being 179 



38. Tracing showing the Effect of Skatol on the Adrenal Output 



of a Dog . . . . . . . . . .181 



39. Tracing showing the Effect of Diphtheria Toxin on the Ad- 



renal Output of a Cat 182 



40. Photomicrographs showing the Effect of Electric Discharge 



on the Brain-cells of an Electric Fish .... 186 



41. Photomicrographs showing the Comparative Effects of Ex- 



cision of the Adrenals and of Excessive Administration 



of Adrenin on the Brain-cells of Dogs .... 191 



42. Photomicrographs showing the Comparative Effects of Ex- 



cision of the Thyroid and of Excessive Feeding with 

 Thyroid Extract on the Brain-cells of Dogs . . . 192 



43. Photomicrographs showing the Effect of lodoform on the 



Brain-cells of a Dog 194 



44. Photomicrographs showing the Effect of lodoform on the 



Adrenals of a Dog 195 



45. Photomicrographs showing the Effect of lodoform on the 



Liver of a Dog 196 



46. Schematic Drawing showing the Course of the Blood Streams 



in Two Dogs with Eight-vessel Crossed Circulation . 200 



47. Tracings showing the Effect of Adrenin on the Blood-pres- 



sure of a Dog whose Brain Alone Received Adrenin . 201 



