4 Gee, The Electrical Resistance of the Human Body. 



the hands as a rule up to the wrist lines. The vessels 

 when short-circuited by a band of zinc had a resistance of 

 2"5 ohms. 



Measurement with Direct Currents. The electrical con- 

 nections are shown in the diagram i^Fig. i). A potentio- 

 meter resistance of about 500 ohms and capable of carrying 



Table I. 



\ of an ampere was used to supply pressure up to 50 volts. 

 The type made by Snell and Tinsley with a sliding 

 contact, was found very suitable for the purpose, enabling 

 the change of voltage to be made very gradually and 

 without sudden variations. This is essential to prevent 



