ut it to make it solid.
Concrete is much better if it can be secured.

To make the swivel you will need two 1/4 by 5 by 8-in. plates,
rounded at the top as shown, and two wood blocks, A and B, each
3-1/2 by 5 by 10 in. Drill the lower ends of the plates for four
2-1/2-in. lag screws and the upper ends for a 5/8-in. bolt. Fasten
the plates to the block B, then drill a 3/4-in. hole as shown and
fasten the two remaining washers to the block, one on each side
and central with the hole. Bore a 5/8-in. hole lengthwise through
the block A for the 5/8-in. rocker bolt. This bolt should be
11-1/2 in. long.

The teeter board is made of a 2 by 12-in. plank about 12 ft. long.
It should be slightly tapered from the center to the ends. Two
styles of hand holds are shown, but the one on the left is the one
most generally used. The handles are rounded at the ends and are
fastened to the board with lag screws or bolts. The block A is
fastened to the board with lag screws and should be a working fit
between the wo plates where it is held by means of the 5/8-in.
bolt. The center pin is 3/4-in. in diameter and about 9 in. long.
--Contributed by W. H. Dreier, Jr., Camden, N. J.

** Home-Made Pot Covers [297]

Empty thread spools and the tins used as extra inside covers in
lard cans are usually thrown away, but these can be put to good
use as kettle covers, if they are made up as follows: Saw the
spool in half as shown, make a hole in the center of the tin and
run a screw or nail through the spool and the tin; then flatten
its end on the under side. This will make an excellent cover for a
pot.
--Contributed by Maurice Baudier, New Orleans, La.

[Illustration: Pot Covers]

** An Outdoor Gymnasium Part I-The Horizontal Bar [298]

Gymnastic apparatus costs money and needs to be housed, because it
will not stand the weather. Gymnasiums are not always available
for the average boy who likes exercise and who would like to learn
the tricks on horizontal and parallel bars, horse and rings, which
all young athletes are taught in regular gymnastic courses.

Any small crowd of boys--even two--having a few simple tools, a
will to use them and the small amount of money required to buy the
necessary

[Illustration: Adjustable Horizontal Bar

wood, bolts and rope, can make a first class gymnasium. If trees
are convenient, and some one can swing an axe, the money outlay
will be almost nothing. The following plans are for material
purc