Fig. 512.—Arm Electrode.
The hand electrode is of greater service since the patient can regulate or make and break the current at will, a matter of no small consequence when fairly large currents are being used to destroy a growth upon the skin of the face.
Needles and Needle Holders.—For the negative electrode the operator uses a needle holder with a needle of proper form and material.
Two needle holders are shown in [Figs. 513 and 514].
Fig. 513. Fig. 514.
Electrolytic Needle Holders.
When the operator desires he may employ an interrupting needle holder with which he can make and break the current at will during the operation. It is shown in [Fig. 515].
