American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 38
byparaffin wax, which, practically, hermetically seals the cell. This cell is often used as a standard of electromotiveforce. Its E. M. P., is about 1.03 volts. Its internal resis-tance is variable, and is at first about 4 ohms, but becomesmuch higher after ordinary usage. Owing to its compactness…
Telegraph
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