Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 167
nerator, the ringer and the battery, makes their connectionin their proper circuit relation, without an undue amount of wiring(the presence of which would be an inconvenience to the user of thedesk) a matter which requires careful study. In order to make the LOCAL BATTERY SUB-STATION EQUIPMENTS.… … FIG. 120.—DRY-BATTERY WALL SET—OPEN. of green silk and is long enough to give sufficient range of motionto the desk stand. The number of conductors In this cord is a
Telephone
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