ML pO

Remarks an Mr Jacob's. Obſerva:ious. 258

contradicted by theſe is to be reje&ed,

kowever plaußfible ic may appear. But

9

in this caſe, theory and experience per fey agree, as will appear by conſider- ing a little the neceſſary conſequences ofthe conical form of the axle arms,

Letta Cc,(fg. II.) repreſétit any heavy body prefling upon del, df being parallel to the horizon. Then it is plain, that d e f will be preſſed from dto f. Therefore an axle, tapered off on the under ſide, prefles the buſh in this e and muſt cauſe the wheel to fly out.

Suppoſe again a heavy body, as A B (fig, 12.) prefling on another C D, and that the ſurface, by wlüch they join is horizontal, it is plain, that CD will be preſled ftraight downwards, withouc

any