Show to make stones stronger almost everybody knos kloas the rule rul ot of the masons that stone used la in building should be so BO placed that it will lie as it lay in its natural bej bed ahen quarried but francis W floyt in the engineering news newa says that this familiar rule needs in many cases to be supplemented with other eions there are three planes of frac ture known to quarrymen quarry men the rift la Is the direction jn n which the stone atone splits most easily the grain that which Is next easiest the head bead that which offers the greatest resistance in a paving block the two sides represent the rift fracture the top and bottom the grain and the ends the head bead but in a quarry tie the natural b bed d is sometimes considerably inclined to the plane of the hence the imperfection of the ordinary rule tor for placing the stone in building |