Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 725
wnmost clearly in Fig. 508, is mounted on the front of the telephonebox, as shown in Fig. 507. It has in it a series of ten holes, intowhich the forefinger of the subscriber is adapted to fit. In orderto send the proper impulses to the central ofifice to secure a con-nection with a line of any… … FIG. 508—TRANSMITTING DEVICE, FRONT VIEW. around, as shown in Fig. 507^ until the finger strikes a stop mountedon the front of the telephone box, as is clearly shown. The dial is
Telephone
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