CHAP, iv.] THE VASCULAR MECHANISM. 



315 



GTrVg,- 



GIH? -| 



FIG. 72. DIAGRAMMATIC REPRESENTATION OF THE CARDIAL INHIBITORY AND 

 AUGMENTOR- FIBRES IN THE DOG. 



The upper portion of the figure represents the inhibitory, the lower the augmentor 

 fibres. 



