considerably modify the results, and especially so when the secondary
conductor is constructed so as to give to such self-induction a large
value. In other words, the maxima of the primary or inducing current
will no longer be found coincident with the zero points of the secondary
currents. The effect will be the same as if the line representing the
wave of the secondary current in Fig. 12 had been shifted forward to a
greater or less extent. This is indicated in diagram, Fig. 13. It gives
doubtless an exaggerated view of the action, though from the effects of
repulsion which I have produced, I should say it is by no means an
unrealizable condition.

[Illustration: Fig. 16.]

It will be noticed that the period during which the currents are
opposite, and during which repulsion can take place, is lengthened at
the expense of the period during which the currents are in the same
direction for attractive action. These differing periods are marked r,
a, etc., or the period during which _repulsion_ exists is from the zero
of the primary or inducing current to the succeeding zero of the
secondary or induced current; and the period during which _attraction_
exists is from the zero of the induced current to the zero of inducing
current.

But far more important still in giving prominence to the repulsive
effect than this difference of effective period is the fact that during
the period of repulsion both the inducing and induced currents have
their greatest values, while during the period of attraction the
currents are of small amounts comparatively. This condition may be
otherwise expressed by saying that the period during which repulsion
occurs includes all the maxima of current, while the period of