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Scientific American, Vol. 42, No. 2 (January 1880) (1880)
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racti- This telephone is one of many, each of which is connected The telephone shown in the lower central figure in the cal value, it has now become an important factor in the daily business and social life of this and other large cities. aecompanying engraving scarcely needs description, its con-… … THE MERCHANTS' TELEPHONE EXCHANGE NEW YORK CITY. © 1880 SCIENTIFIC AMERICAN, INCPatents · Jet · Feet · Patented · Scientific American · Cents · Absolute alcohol · Switch rod · Central office · Rapid developer · Three feet · Acetic acid · Second avenue · Distilled water · Steam engine
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