Scientific Proceedings. 



ioi 



weeks and an injection of adrenalin had no effect upon the pupil. 

 For the last three weeks the dilation of the right pupil had again 

 returned. 



On account of the very moderate effect which the intramuscular 

 injection of adrenalin had caused in the left pupil in the last few 

 days, an intravenous injection of adrenalin was tried on this animal 

 for the first time. Not more than 0.3 c.c. of adrenalin (1 : 1000) 

 were given through the ear vein. The right pupil remained un- 

 changed, fairly dilated. The left pupil became gradually dilated 

 so that after an hour the dilation was at the maximum. Half an 

 hour later the animal fell over on its side, blood and foam escap- 

 ing through the mouth and nose. The rabbit died of acute pul- 

 monary edema. 



At the autopsy, no sign of a ganglion could be discovered 

 macroscopically on the left side ; in the neighborhood of the seat 

 of the ganglion the sympathetic nerve was lost in strands of con- 

 nective tissue. (The abdominal aorta showed a few sclerotic 

 patches.) 



69 (212) 

 Intra-abdominal pressures. 

 By Haven Emerson. 



[From the Department of Physiology of Columbia University, at the 

 College of Physicians and Surgeons. ,] 



Definition : 



1 . Pressures upon solid viscera. 



2. Pressures within hollow viscera. 



3. Pressures within blood and lymph vessels. 



4. Pressures within the free peritoneal cavity. 



Pressures upon solid viscera cannot be other than those present 

 in the free peritoneal cavity. 



Pressures within hollow viscera have been fairly established. 



Pressures within blood and lymph spaces have been accurately 

 determined. 



Pressure within the free peritoneal cavity has been a subject of 

 disagreement since 1865 when Braune declared it was negative. 



To determine the normal pressure and its variations within the 

 peritoneal cavity a perforated trocar was used to pierce the abdom- 



