The intensity of magnetization, or, more shortly, the magnetization of a uniformly magnetized body is defined as the **magnetic moment** per unit of volume, and is denoted by I, I, or „a.

A magnet may be regarded as consisting of an infinite number of elementary magnets, each having a pair of poles and a definite **magnetic moment**.

After pointing out that, since the magnetization of the metal is the quantity really concerned, W is more appropriately expressed in terms of I, the **magnetic moment** per unit of volume, than of B, he suggests an experiment to determine whether the mechanical work required to effect the complete magnetic reversal i Phil.

Du Bois's results, which, as given in his papers, show the relation of H to the **magnetic moment** per unit of mass, have been reduced by Ewing to the usual form, and are indicated in fig.

The strength of the induced current is - HScosO/L, where 0 is the inclination of the axis of the circuit to the direction of the field, and L the coefficient of self-induction; the resolved part of the **magnetic moment** in the direction of the field is equal to - HS 2 cos 2 6/L, and if there are n molecules in a unit of volume, their axes being distributed indifferently in all directions, the magnetization of the substance will be-3nHS 2 /L, and its susceptibility - 3S 2 /L (Maxwell, Electricity and Magnetism, § 838).