Fig. S8. — Electrocardiograms for Pea and Kon. 

 A is from L' for Pea, the tissue resistance 4,000 ohms; B from L^ for Pea, 4,000 ohms., both taken in the group chamber; C from 1? for Kon, subject reclining in steamer chair, in room C, resistance 3,500 ohms. 

 All taken December 20, 1917. The tracings which show the slowest pulse-rates have been illustrated in this and the other figures for electrocardiograms. The smallest divisions on the abscissaeare 0.04 

 second. At the top of each tracing are records for 0.2 and 2 second intervals. The smallest divisions on the ordinates represent 1 XIO-'' volts. In certain cases the R spike has been retouched to aid 

 clear illustration. 



