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494,447
and a second roll provided with circumfer- ential corrugations, a series of rawhide strips running longitudinally of said roll and hav- ing one edge lying in channels in said roll 5 and attached by screws, or nails, driven in the lines of the channels intermediate of the said circumferential corrugations, leaving the other edges free, substantially as described.
In testimony whereof I have hereunto set my hand and affixed my seal in presence of ro two subscribing witnesses. HENRY C. SNIDER. [L. S.] Witnesses: P. P. STRINGER, S. G. GRAHAM.