rce of power. The lens-holding devices consist of a vertical shaft carrying these two roads has been well earned, and that twenty In an invention patented by Andrew Dinkel, of at its upper extremity an abrading disk upon which or thirty years ago they were easily first in their re- Auburn, N. Y.,… … DINKEL'S POWEB-HAMHEB. than one of the great systems of the United States. THOMSON'S LENS-GBINDING MACHINE. The motive power of the Pennsylvania Railroad has always been marked by strong individual character- by means of a belt and pulley driven by a power-shaft provided, by means of which a strong…
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