pulsive preponderance in question. The tendency is to thrust the
plate, B, out of the slot in the ring excepting only when its center is
coincident with the magnetic axis joining the poles of the ring between
which B is placed.

If the axes of the conductors, Fig. 5, are not coincident, but
displaced, as in Fig. 8, then, besides a simple repulsion apart, there
is a lateral component or tendency, as indicated by the arrows. Akin to
this is the experiment illustrated in Fig. 9. Here the closed conductor,
B, is placed with its plane at right angles to that of C, wound on a
wire bundle. The part, B, tends to move toward the center of the coil,
C, so that its axis will be in the middle plane of C, transverse to the
core, as indicated by the dotted line. This leads us at once to another
class of actions, i.e., deflective actions.

[Illustration: FIG. 12.]

When one of the conductors, as B, Fig. 10, composed of a disk, or,
better, of a pile of thin copper disks, or of a closed coil of wire, is
mounted on an axis, X, transverse to the axis of coil, C, through which
coil the alternating current passes, a deflection of B to the position
indicated by dotted lines will take place, unless the plane of B is at
the start exactly coincident with that of C. If slightly inclined at the
start, deflection will be caused as stated. It matters not whether the
coil, C, incloses the part, B, or be inclosed by it, or whether the
coil, C, be pivoted and B fixed, or both be pivoted. In Fig. 11 the
coil, C, surrounds an iron wire core, and B is pivoted above it, as
shown. It is deflected, as before, to the position indicated in dotted
lines.

[Illustration: FIG. 13]

It is important to remark here that in cases where deflection is to be
obtained, as in Figs. 10 and 11, B had best be made of a pile of thin
washers or a closed coil of insulated wire instead of a solid ring. This
avoids the lessening of effect which would come from the induction of
currents in the ring, B, in other directions than parallel to its
circumference.

[Illustration: FIG. 14.]

We will now turn our attention to the explanation of the actions
exhibited, and afterward refer to their possible applications. It may be
stated as certainly true that were the induced currents in the closed
conductor unaffected by any self-induction, the only phenomena exhibited
would be alternate equal attractions and repulsions, because currents
would be induced in opposite directions to