ELEMENTAEY EXPEEIMENTAL PHYSIOLOGY 83 



FIG. 82. Sphygmograph provided with time writer (Jacquet). 



PIG. 83. Pulse tracing (sphygmogram) taken by Jacquet's sphygmograph, 



o d=the period of the pulse curve, 6= the primary, c=the dicrotid wave. 



Time marked in fifths of a second. 



