American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 42
FIG. 12. ZJ … DRY CELL. GASSNER DRY CELL. The general external appearance of a dry cell is illustrated in Fig. 12. Thestructure of the cell is, however, frequently varied both as to size and shape. Used as a* call bell battery, or for similar purposes, successful, dry batterieswill last, without renewal, for…
Telegraph
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