502 ON THE PHYSIOLOGICAL ACTION OF CASCA BARK. 



small kymograph, the pulse-wave and oscillation being recorded 

 on a revolving drum. 



The appended curves give the oscillations of pressure in the 

 aorta, and show that under the influence of casca the blood- 

 pressure in the aorta rises to twice its normal height during 

 systole, although it falls to zero during diastole. 



FiQ. 159 



Normal pulse QO mm.) 



Pulse three minutes after 

 injection of 1 c.c. of a 

 solution of casca into flank 



er"! 

 k!/ 



Pulse one minute after a \ 

 . second injection of 1 c.c. j 



Pulse three minutes later 



Experiment XXXIIL— March 31. 



Action on the heart and blood-pressure of a large dose of 

 casca. (For action on secretion of urine also, vide infra.) 

 A bitch, weight 26 J lbs., was chloroformed. 

 A cannula was placed in the trachea. 



„ „ left femoral vein. 



„ „ right ureter. 



„ „ left carotid artery. 



The operation was very long, and during it the intestines 

 became much congested. 



