The gravity cell is cheap, easy to construct, and of constant strength, and is in almost universal use in telegraphic work.
The gravity cell has a practically constant voltage of 1.08 volts.
The elements of the gravity cell are electrodes of copper and zinc.
The gravity cell is perhaps the most common type of cell wherein depolarization is affected by electro-chemical means.
This is because the current meets more resistance within the gravity cell than within the voltaic cell.
This apparatus is good to work a gravity cell when it needs regulating.