true that the reputation of being @riven from acommon source of power. The these two roads has been well earned, and that twenty lens-holding devices consist of a vertical shaft carrying In an invention patented by Andrew Dinkel, of at its upper extremity an abrading disk upon which or thirty years… … most sumptuously appointed train in the world, al- though to-day its counterpart can be found on more DINKEL’S POWER-HAMMER. than one of the great systems of the United States. THOMSON’S LENS-GRINDING MACHINE. The motive power of the Pennsylvania Railroad has provided, by means of which a strong…
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