276 



Dr. C. Bolton. Dropsy produced by [Dec. 19, 



•Oct. 24, 1906. Cat ; weight, 3200 grammes. Morphia, \ grain. Ether and 



artificial respiration. 



Pressures. 



Carotid artery. 



Yein of foot. 



Before obstruction ' 110 mm. Hg 



After complete obstruction ... 46 ,, 



Obstruction removed I 104 „ 



2 minutes later ■ 110 „ 



Obstruction to 2 mm. 



5 minutes later 



5 

 5 

 5 

 5 

 5 

 5 

 5 



5 



5 



5 



5 



5 



Obstruction removed 



3 minutes later 



64 



96 mm. Hg 



70 mm. Hg 

 56 mm. Hg 



74 mm. Hg 

 80 



142 mm. MgS0 4 solution 



204 



120 



135 



160 „ 



195 



191 



193 „ 



183 „ 



184 



183 



185 



172 



165 



164 



158 



152 



143 



123 



120 



The following experiment demonstrates the fact that the pressure in the 

 veins of the foot rises when the pressure in the pericardium is increased by 

 the introduction of oil into that sac. 



Nov. 24, 1906. Cat: weight, 3050 grammes. Morphia, -£- grain. Ether and 



artificial respiration. 



Pressures. 



Before introduction of oil 



During injection, | minute intervals 



Injection stopped 



Oil allowed to run out 



Pressures at \ minute intervals 



Oil introduced 2nd time 



Pressures at \ -minute intervals. 



Oil allowed to run out 



Pressures at £ -minute intervals. 



Carotid artery. 



Vein of foot. 



84 mm. Hg 



48 mm. Hg 



90 mm. Hg 



84 



32 mm. Hg 



90 mm. Hg 



MgSo 4 solution 



