racquet passes up and over the call, travelling from left to
right and slightly forward. The result is a curve to the left and
the break of the bound to the right. This service is not fast,
but gives an excellent chance to follow to the net, since it
travels high and slowly and its bound is deep. The American twist
service should be hit with the muscles of the side. The slice is
a shoulder swing.

The reverse twist is of an absolutely distinct type. The stance
is facing the net with both toes fronting the line. The racquet
is gripped as a club. The ball is thrown in front of the body and
not high. The swing is a sharp wrist twist from right to left,
the ball carried for some distance on the face of the racquet.
The curve is from left to right while the bound is high and
breaks sharply to the left. This delivery is slow, ineffective
and very uncertain. There is little opportunity to follow it to
the net.

The "cannon-ball" service is nothing but a slice as regards swing
and stance, but it is hit with a flat racquet face, thus
imparting no spin to the ball. It is a case of speed alone. This
service is a point winner when it goes in; but its average must
necessarily be poor since its margin of error is so small. It is
only useful to a tall man.

Varied pace and varied speed is the keynote to a good service. I
spent hours in serving alone, striving to disguise the twist and
pace of the ball. I would take a box of a dozen balls out on the
court and serve the whole dozen to No. 1 court with one style of
delivery. Then, crossing, I would serve them back with another