BY JAMES ir. PETRIE. 



341 



In this instance when the heart stop- 

 ped the ventricle was irregularly con- 

 tracted, and it contained blood in small 

 isolated patches, especially about the 

 base. The diagram shows the record 

 at the beginning, middle, and end ot 

 the experiment. The mark under the 

 top line indicates where the alkaloid 

 wa-s applied. 



Exp. 3. — Hijla aurea, weight 17 gnis. 



The diastole became less perfect, and 

 the systole stronger and more perfect. 



Exp. 4. — IJyhi caerulea, weight 39 gms. 

 Effect of small dose on large frog. 

 {See diagram) • 



Two drops of the 0.5% solution were 

 applied in this ca.se; the heart gradu- 

 ally Ijeat slower and weaker, till it 

 stopped with tlic ventricle in systole. 



