HOCKEY BALL.—Field Hockey is played with the same kind of ball as Cricket, but white instead of red. This is usually but not invariably covered with white leather, the latter sometimes enameled, put on in even hemispheres instead of in shaped pieces like the covering of a baseball. The dimensions are the same as for a baseball but the weight usually about 1/2 ounce greater. Field Hockey balls measure 9 inches in circumference and weigh 5-1/2 ounces. The official rules of the American Field Hockey Association specify merely "an ordinary cricket ball painted white." Hockey balls cost from $1 to $2.75 each; practice balls of solid rubber, fifty cents.
Ice Hockey is played with a "puck," solidly cylindrical in shape and smaller than the ring for Ring Hockey. The official specifications for the American Amateur Hockey League require a puck of vulcanized rubber one inch thick throughout, 3 inches in diameter, weight not less than 7-6/16 ounces nor more than 7-9/16 ounces. These cost fifty cents; practice pucks, twenty-five cents.
Ring Hockey or Indoor Hockey is played indoors with a ring of flexible rubber, 5 inches in diameter, with a 3-inch hole through the center. The official rules specify a weight of not less than 12 ounces nor more than 16 ounces. Rings cost from $1 to $1.25 each.
INDOOR BASEBALL.—Indoor baseballs are specially constructed for indoor play, being much larger and more elastic than those for outdoor play. This ball is generally composed of a core of packed leather strips, around which is placed curled horsehair tied on with string. The cover is of leather, preferably horsehide, somewhat softer in quality than that used on the outdoor baseball. The dimensions of the ball vary from 15 to 17 inches in circumference, or about 5 inches in diameter. The weight is from 8 to 8-3/4 ounces. The official ball specified by the National Indoor Baseball Association of the United States is not less than 16-3/4 nor more than 17-1/4 inches in circumference; made of yielding substance; not less than 8 nor more than 8-3/4 ounces in weight; and is required to be covered with white skin. The color of the ball naturally assists in indoor play where lights vary. Most of these balls have red stitching on the seams, which makes them even plainer to be seen. Good balls cost from eighty cents to $1.25 each.
LA CROSSE BALL.—The official ball for the game of La Crosse is made of sponge rubber, sometimes leather covered (white). It is very slightly smaller in size than a baseball, and about the same weight. The Intercollegiate La Crosse Association of the United States specifies a ball weighing about 5-3/4 ounces, with circumference of 8 inches. The National Amateur La Crosse Union of Canada specifies a weight of from 4-1/2 to 5 ounces, and circumference of not less than 7-3/4 nor more than 8 inches. The best balls cost sixty-five cents each.
MEDICINE BALL.—Medicine balls are leather covered and of greater weight than any others used in the gymnasium. These balls were devised to give exercise of a vigorous character, particularly for the abdominal and other trunk muscles, and afford some of the most hygienic exercise to be had in the gymnasium. Medicine balls vary considerably in size and weight. The usual balls measure from 10 to 16 inches in diameter, and weigh from 4 to 12 pounds. They cost from $4.50 to $15, those with laced leather covers being more expensive than those with sewn covers.
OAT SACKS.—Oat sacks as here described were devised by Dr. R. A. Clark and Mr. A. M. Chesley, to be used in place of medicine balls for adult players. In addition they may be used for many bean-bag games. Oat sacks are made of heavy (10 oz.) duck. They are circular in shape, 14 inches in diameter when finished. Two circles of this size are stitched around the edge, except for an opening where the oats are inserted. The bag is then 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.