en turned and stitched a second time. They are
then filled with four pounds of oats each.

PLAYGROUND BALL.--For the game of Playground Ball there is used a ball
that in size is between a baseball and indoor baseball. Usually balls
of from 12 to 14 inches in circumference (of this type of
construction) are called playground balls, and those from 15 to 17
inches, indoor baseballs. Because of their size, these balls cannot be
batted as far as the usual baseball, and this and their softer texture
make them especially useful for limited areas. This same type of soft
ball may be had in the smaller size of the regulation baseball. The
construction is the same as for indoor baseballs--a wound ball covered
with soft white leather, the whole being firm, but more elastic and
yielding than a baseball.

The National Amateur Playground Ball Association of the United States
specifies a ball not less than 12 inches nor more than 14 inches in
circumference, not less than 8 ounces nor more than 8-3/4 ounces in
weight, made of yielding substance covered with a white skin.

Good playground balls of any of the sizes here mentioned cost $1 each.

POLO BALLS.--_Polo_ or _Roller Polo_ (on roller skates) is played with
a very hard rubber-covered ball, painted bright red and about the size
of a baseball--9 inches in circumference. Cost, from ten cents to $1
each.

_Equestrian Polo_ is played with a wooden ball, usually of willow,
having no other covering than white paint. The Polo Association of
America specifies such a ball 3-1/8 inches in diameter and not to
exceed 5 ounces in weight. The English rules (Hurlingham) call for a
slightly larger and heavier ball, 3-1/4 inches in diameter and 5-1/2
ounces in weight--material not specified. Willow balls cost $2 per
dozen; others, $1.25 per dozen.

_Water Polo_ is played with a ball of white rubber, inflated through a
key afterward used to screw shut the opening. The official American
rules for Water Polo call for a white rubber ball of not less than 7
nor more than 8 inches in diameter. Cost, $2 each.

PUSHBALL.--The game of Pushball is played with the largest ball ever
constructed for any game. The ball measures 6 feet in diameter, and
consists of an inflated rubber bladder inserted in a leather cover.
Cost, $200 each.

RUGBY BALL.--See _Football_.

SOCCER BALL.--See _Football_.

SQUASH BALL.--For the game of Squash, a hollow rubber ball is used
similar to a tennis ball, and about the