In [Fig. 9] a similar battery is shown to that just described; but the elements consist of carbon and zinc, and are lifted into and out of a bichromate solution. As it can be recharged by the owner without the necessity of sending it to the maker, it is especially suited for country and colonial practitioners.
Fig. 9. 40-Cell Voltaic Battery with zinc and carbon elements, and lifting apparatus.
Essentials of a Medical Voltaic Battery.
To recapitulate. The essentials of a medical Voltaic battery are—
a. A constant supply of electricity of sufficient quantity and quality.
b. A means by which this electricity may be administered in measured doses.
c. A means by which the direction of its current may be changed.
d. A means by which it may be instantly discontinued.