IOWA ACADEMY OF SCIENCE 129 



3. The beneficial effect of intravenous injection of epinephrin in 

 conditions of low blood pressure with a constricted arterial system may 

 be due to the establishment of a more rigid venous wall by the con- 

 traction of the longitudinally place muscle fibres in the veins. 



4. More experimental evidence is needed along these lines to estab- 

 lish the true physiological action of the venous wall as a force in the 

 circulation. 



