e kept thereby square groove. The hollow arm, g g, is secured to importance done upon the musket barrel, it is obvious constantly in contact and the necessary reciprocating POWERS'S MACHINE FOR RIFLING GUN BARRELS. that the whole job will be condemned if it fails in this the frame, A A, by bolts, k… … it. The driving shaft m to' to", carrying the pinion, when he undertakes to devise a machine of this kind. the feed wire, forces the cutters out for the next cut; n, is connected to this wheel by the universal joint, Pig. 1 is a perspective view of the machine for this continues until the button,…
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