When the blade of a favorite pocket knife, after constant use, becomes like A, Fig. 1, it is more dangerous than useful. To cut down the already worn blade would leave only a stump, but if the blade is fastened in a vise and the point B filed off until it is like C, Fig. 2, the projecting point A, Fig. 1, will sink into the handle as shown at D, Fig. 3, and the knife will be given a new lease of usefulness. ---Contributed by James M. Kane, Doylestown, Pa.

Fig. 3 The Blade Is Cut Down