The Action of Eucomis undulata, Ait. 
3 
Action on the Isolated Heart. 
The movements of the isolated mammalian heart were recorded by 
perfusion through the coronary arteries. The heart of the rabbit, cat, rat 
and guinea-pig were used. The effect of Eucomis undulata was to slow and 
Fig. 2. 
ABODE F 
weaken the heart and arrest it in diastole. In Fig. 2 the effect of 0 5 per 
cent, tincture is shown on the movements of the cat's heart, a is the normal 
heart tracing, b, c, d, e and r the movements after perfusing with the 
experimental solution for 1, 3, 4, 6 and 8 minutes respectively. 
Fig. 3. 
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The isolated frog's heart was arrested in diastole, but sometimes there 
was a slight increase of tone. 
Action on Unstriated Muscle. 
The tone of the uterus — pregnant and non-pregnant — of the cat and 
rabbit is increased by Eucomis undulata, as shown in Fig. 3. 
