This is a mixture of steel and iron, invented by Mr. Wiswould,* of Birmingham; but as he wishes the method of making it to be kept secret, I cannot say more than that its composition is three-fourths steel, and one-fourth iron; and that, like the Damascus, it is twisted in the rod, but not to the same extent, not having more than from four to five twists in the inch. Two of these twisted rods are welded together, with the grain of the metal running in an angular direction, as represented: