I am a manufacturer of steel. The steel which I make may be hardened so as to become

I am a manufacturer of steel. The steel which I make may be hardened so as to become a spring, or it may be heated so as to become a magnet. It may also be used to write upon, or to print, or to form a part of a chemical apparatus. The purpose, for which you see me, is to enable you to purchase a magnetic steel, which shall mark upon another piece of steel, so as to produce a permanent magnet. The steel,