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$ 1,387,733 the head hnd having t drilling point pro-.. an angular opening extending axially there- jecting from the head, and means for fas- through, and a point member fitting snugly 10 tening the point in the -head. in said opening and having a cutting point 3. In- a well drilling bit, a head having extending well below the underside of the 5 spiral. cutting edges and a. tapered under- head. side with cutting edges contiguous to the In testimony whereof I affix my signature. spiral cutting edges, a shank on the upper end of the head, the head and shank having PENELTON G. MIDGETT.