hub, the bolt revolving with conical shaped cavity in the centre ot its up- ingenious man, has had constructed, for use in proved mode of attaching hubs to axles, the the hub. per surface, which is filled with silver, and his stone yard, an engine with a square cylin- made smooth and even ; a… … is of cast metal, and composed of spiral wings, the “ Genie Industrielle.” The annexed engraving represents a valua- terior cone, and moves it round about, as exhi- with the backs brought as closely as possible bited in the engraving. Oo together, so as to unite and form a solid axis of Wigs and…
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