A screw stirrer is provided, and the whole apparatus is immersed in kerosene in the glass box of a storage cell.
This fact of itself tends to keep down the size of the storage cell which is most popular.
The circuit through the transmitter also includes a voltaic or storage cell and the primary coil of an induction coil.
Fig. 85 shows another form of storage cell containing a number of plates.
A 4-volt storage cell of 20 amperes capacity is quite sufficient to work the apparatus for several days.
Suppose I hadn't been working with a storage cell that gave only four amperes at two volts?
In Fig. 416 is illustrated a storage cell employing a glass container and having fifteen plates.