The roof is glued to the top of cabin, E, and to the tops of posts, N, which are pieces of stripwood ¼" × ¼" × 2".
Triangular pieces of cardboard are glued in the corners, as P in Fig. 507.
Fig. 509
The railings are 1 inch high; they can either be made of strips of cardboard 1 inch by 8½ inches supported at the corners and in the middle by pieces of stripwood ¼" × ¼" × 1", with criss-cross lines drawn on them, or be made as in Fig. 509, where A B and C D are strips of cardboard ¼ inch wide, F is stripwood ¼ inch by ¼ inch, and 1, 2, 3, etc., are parts of match sticks glued to the cardboard strips. Seats can be placed round the railings, and round the cabin where there are no doors.
A piece of stripwood, R, ½" × ½" × 1½", is cut and filed as in Fig. 507 and glued to the middle of the roof.
The platform is then glued to the tops of the posts with their surrounding corks. The frame, A A A A, is mounted on wheels 1-1/8 inches in diameter and ¼ inch in width. The axles are pieces of stripwood ¼ inch by ¼ inch, to which the frame A A is glued.
The rails on which it runs (a b in Fig. 507) are made in a similar manner to those described in Chapter XIII, for the transporter bridge. It is pulled along by thread tied to screw-eyes X and Y, and wound up by winding gear similar to that described in Chapter XIII.
