guy wires. In addition to these
eye-bolt holes there are two others through which screws are fastened
into the frame pieces. On the front frame piece of the bottom plane
place six sockets, beginning at the end of the frame, and locating them
exactly opposite the struts. Screw the sockets into position with wood
screws, and then put the eye-bolts in place. Repeat the operation on the
rear frame. Next put the sockets for the upper plane frame in place.

You are now ready to bring the two planes together. Begin by inserting
the stanchions in the sockets in the lower plane. The ends may need a
little rubbing with sandpaper to get them into the sockets, but care
must be taken to have them fit snugly. When all the stanchions are in
place on the lower plane, lift the upper plane into position, and fit
the sockets over the upper ends of the stanchions.

Trussing with Guy Wires.

The next move is to "tie" the frame together rigidly by the aid of guy
wires. This is where the No. 12 piano wire comes in. Each rectangle
formed by the struts and stanchions with the exception of the small
center one, is to be wired separately as shown in the illustration. At
each of the eight corners forming the rectangle the ring of one of the
eye-bolts will be found. There are two ways of doing this "tieing," or
trussing. One is to run the wires diagonally from eye-bolt to eye-bolt,
depending upon main strength to pull them taut enough, and then twist
the ends so as to hold. The other is to first make a loop of wire
at each eye-bolt, and connect these loops to the main wires with
turn-buckles. This latter method is the best, as it admits of the
tension being regulated by simply turning the buckle so as to draw the
ends of the wire closer together. A glance at the illustration will make
this plain, and also show how the wires are to be placed. The proper
degree of tension may be determined in the following manner:

After the frame is wired place each end on a saw-horse so as to lift the
entire frame clear of the work-shop floor. Get under it, in the center
rectangle and, grasping the center struts, one in each hand, put your
entire weight on the structure. If it is properly put together it will
remain rigid and unyielding. Should it sag ever so slightly the tension
of the wires must be increased until any tendency to sag, no matter how
slight it may be, is overcome.

Putting on the Cloth.

We are now ready to put on the cloth covering which hol