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Scientific American, Vol. 60, No. 13 (March 1889) (1889)

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An illustration from Scientific American, Vol. 60, No. 13 (March 1889), 1889, leaf 0
ended so as to include 10,000. The building is fireproof throughout. The cellar is excavated under the sidewalk and roadway of the street. In its front end are. the terminals of several subway conduits partially occupied by cables. At present forty-nine lead-incased cables enter the building (Fig.… … operation is performed in the build- Kg. 2.-ARRANGEMENT OF SPRING Fig. 3.-REAR VIEW OF SWITCHBOARD, SHOWING CABLES. (Continued on page 199.) JACKS, SWITCHES, AND ANNUN- CIATORS ON SWITCHBOARD. Fig. 4.-NEW CENTRAL STATION OF THE METROPOLITAN TELEPHONE CO., N. Y.-THE GENERAL EXCHANGE. ©1889…

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