Magnetization, Limit of.
As the induction of magnetizing force increases, magnetization of
paramagnetic metals tends towards a limit, the increase in magnetization
being continually less and less as the metal becomes more highly
magnetized. In diamagnetic substances no limit is discernible.
Synonym--Maximum Magnetization.
Magnetization, Specific.
The magnetic moment per gram of a substance.
Magnet-keeper.
A bar of iron connecting the two poles of a permanent magnet. Often the
same bar serves as armature and keeper.
Magnet, Lamination of.
It is advantageous to make magnets of laminated construction, or of thin
plates of steel. The thin metal can be better tempered or hardened than
thick metal. A slight separation of the plates is advantageous from some
points of view. If in actual contact there is some danger that the
weaker members will have their polarity reversed by the stronger ones.
This is counteracted to some extent by separation.
Magnet, Long Coil.
A high resistance electro-magnet; one whose coil is of thin wire of
considerable length.
Magnet, Natural.
The lodestone, q. v.; a variety of magnetite or magnetic oxide of iron,
exhibiting permanent magnetism, attracting iron, and possessing north
and south poles.
Magnet, Neutral Line of.
A line at right angles to the magnetic axis of a magnet, q.v., and
nearly or quite at the centre, so situated with reference to the poles
on either end that it marks the locus of no polarity. It has been called
the equator of the magnet. It is defined by the intersection of the
plane of no magnetism with the surface of the bar.
Synonym--Magnetic Equator.
Magnet, Normal.
A bar or compound bar magnet, magnetized to such an extent that the
curves of the lines of force run into each other in the middle, is thus
termed by Jamin.
Magneto.
Abbreviation for Magneto-electric Generator. (See Magneto-electric
Generator.)
Magneto Call Bell.
A call operated by current from a magneto-electric generator. It is very
generally used in telephone systems.