This section is from the book "The Scientific American Boy", by A. Russell Bond. Also available from Amazon: The Scientific American Boy.
Our next task was to step the mast. We found in the shed an old flagstaff 15 feet long and 3 inches in diameter. The lower end of this, for about a foot, we whittled down to a diameter of 2 inches, and drove it into a hole in the backbone 12 inches from the forward end. The mast was stayed by a wire stretched from the head to an eye bolt at the fore end of the backbone. The end of the mast which projected below the backbone was stayed with wire running forward to an eye bolt and aft to a screw eye on the backbone, and also with a pair of wires running to screw eyes threaded into the crosspiece near the ends. We couldn't very well use eye bolts on these wires except at the fore end, but we stretched the wires as tight as possible before the screw eyes were screwed all the way in, and then, as we turned the screw eyes, the wire was wound up on them and drawn fairly taut. Fig. 219 shows a side view of the frame, and wires marked 1 and 2 are the same as illustrated in Fig. 218, which is a top or plan view of the frame.

Fig. 218. The Frame with Wire Braces.
 
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