hased from a mill squared and cut to length. To substitute
small, straight trees for the squared timbers requires but little
changes in the plans.

The most important piece of apparatus in the gymnasium is the
horizontal bar. Most gymnasiums have two: one adjustable bar for
various exercises and a high bar for gymnastic work. The outdoor
gymnasium combines the two. The material required is as follows: 2
pieces of wood, 4 in. square by 9-1/2 ft. long; 4 pieces, 2 by 4
in. by 2 ft. long; 4 pieces, 1 by 7 in. by 6-1/2 ft. long; 4
filler pieces, 3/4 by 3 in. by 3 ft. 9 in. long and 1 piece, 2-1/2
in. square by 5 ft. 7 in. long. This latter piece is for the bar
and should be of well seasoned, straight-grained hickory. It makes
no difference what kind of wood is used for the other pieces, but
it is best to use cedar for the heavy pieces that are set in the
ground as it will take years for this wood to rot. Ordinary yellow
pine will do very well. The four 7-in. boards should be of some
hard wood if possible such as oak, hickory, maple, chestnut or
ash. The other material necessary consists of 2 bolts, 1/2 in. in
diameter and 7 in. long; 16 screws, 3 in. long; 4 heavy screw eyes
with two 1/2-in. shanks; 50 ft. of heavy galvanized wire: 80 ft.
of 1/4-in. manila rope and 4 pulley blocks. Four cleats are also
required but these can be made of wood at home.

Draw a line on the four 7-in. boards along the side of each from
end to end, 1-1/4-in. from one edge. Beginning at one end of each
board make pencil dots on this line 5 in. apart for a distance of
3 ft. 4 in. Bore holes through the boards on these marks with a
9/15-in. bit. Fasten two of these boards on each post with the
3-in. screws, as shown in the top view of the post Fig. 1, forming
a channel of the edges in which the holes were bored. Two of the
filler pieces are fastened in each channel as shown, so as to make
the space fit the squared end of the bar snugly. The ends of the
boards with the holes should be flush with the top of the post.
This will make each pair of holes in the 7-in. boards coincide, so
the 1/2-in. bolt can be put through them and the squared end of
the bar.

Select a level place where the apparatus is to be placed and dig
two holes 6 ft. apart, each 3 ft. deep and remove all loose dirt.
The ends of the posts not covered with the boards are set in these
holes on bricks or small stones. The channels formed by the boards
must be set facing each other w