71 ‘ON Havay 
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Nos. т AND 2. L. V. indicates the application of an electrical stimulus to the left vagus P. V. L. V. indicates the application of 
an infusion of Panaeolus venenosus to the left vagus. The time curve indicates seconds. 
No.1. The upper curve is a record of the contraction of a heart of a turtle showing the effect of P. venenosus on the left 
vagus nerve. Stimulation of the nerve produces no inhibition of the action of the heart. 
Мо. 2. Continuation of the same record showing complete failure of the left vagus to cause inhibition and the recovery of the 
vagus 18 minutes after the administration of the infusion. 
DHNIAGTT 
SWOONHSQK SNONOSIOd JO зятояав ОМІ, 
6I 
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