Magnet

Loadstone, a magnetic oxid of iron. A body having the power to attract the unlike pole of another magnet, or to repel the like pole, aud also to attract easily magnetizable bodies. A body having a magnetic field. M., Electro-, a piece of soft iron temporarily magnetized by induction or by insertion into a helix. M., Gruening's, an instrument consisting of several magnetized steel rods, used for the removal of iron and steel particles from the eye. M., Horse-shoe, an iron magnet having the shape of a horse-shoe. Reoperation, the operation of removing foreign bodies of steel from the eye by the aid of a magnet. M., Permanent, one the magnetic properties of which are permanent, in contradistinction to M., Temporary, which derives its magnetism from another magnet or from a galvanic current.