The mischief committed by mice during the winter in gnawing trees is not only an annoyance, but often a serious loss. Various preventives have been suggested, and we have recommended some which we know to possess more or less merit. Being recently at the fine residence of B. Vaughan, Esq., we observed that all the trees in the orchard house were protected by tin, and was assured that it had always proved effectual. A piece of tin six or more inches long, and wide enough to meet the circumference of the tree, is rolled around it, and pressed a little into the soil; in other words, the stock of the tree is inclosed in a small tin cylinder from the surface of the ground to a height of six or more inches. In the spring the cylinder is unrolled and removed, to be replaced again the following fall, A similar contrivance, made of zinc, we should think would prevent the borer from entering the peach and other trees; at all events, it is simple, cheap, and worth trying. The borer will, however, sometimes eater the peach a foot or more above ground when cut off from below; but then he is more plainly in view, sooner discovered, and easily killed.