ire upon large reels or drums continues the operations upon the double needles until very from any adhering sawdust by means of an air-blast, of from fifteen to eighteen feet in diameter. The large coil near the concluding steps. We will begin with the former and are again submitted to the scouring… … Fig. 6—-CEMENTING. — burnishing machine, in which the needles are ing the shafts at both ends. Grindstones of on a steel wire to which rapid revolution is imparted, was machine employed is shown in Fig. 4, and will be readily tine-grained sandstone are used with this view, rotating by introduced…
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