. Scientific American Volume 77 Number 02 (July 1897) . i^igoFTELEPHONES. E:LECrRlCAL SUPPL/BS ^^^^^SS:^^^ If you want the best Ijathe and Drill CHUCKS Binr \Grip, Great-est Capacit/y ^and Durabil-ity, Cheap a/nd Accurate. Westcott Chnck Oneida, N. Y., U. S. A. Ask for catalogue in ETiglish, French, Spanish or Prize at Columbian Exposition,

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