1156 
After about one hundred systoles of a frog’s heart had been 
transferred to the smoked paper, according to the suspension-method, 
10 drops of a 1°/, solution of acetas veratrini are injected into the 
abdominal cavity. The rhythm slackens, the a-v interval increases, 
till half an hour after the injection one auricle- and one ventricle- 
systole fall out (Vide Fig. I upper-row). Afterwards the 10% 
Suspensioncurves of a frog’s heart poisoned with veratrine ; in the upper-row 
of curves twice on systole of ventricle and auricle fall out. 
The lower row of curves shows bigeminus-groups and is reproduced 20 minutes 
later. Time | sec. (just as in all further figures). 
Both rows of curves are continuations of those of Fig. 1, but 27 systoles afterwards. 
