304 



THE CIRCULATION IN THE BLOOD-VESSELS [CH. XXII. 



FIG. 266. Arterial blood-pressure tracing from dog showing Mayer waves. (Sherrington.) 



FIG. 267. Rise in arterial blood-pressure produced by stimulating the central end of a sensory nerve (external popliteal) 

 in a cat under the influence of morphine and curare. BP, blood-pressure ; A, abscissa or base-line ; T, time intervals 

 of 5 seconds ; E, signal line, the lowering of which indicates the period of stimulation of the nerve. The size of the figure 

 is slightly reduced in reproduction. (Sherrington.) 



