Fig. 301.—The Panorama Box.
Before putting the panorama box together bore holes in the top board, at equal distances from the ends, and as near the front edge as you can conveniently bore them without danger of splitting the board. These holes are for the rollers, and should be of sufficient size to allow the rollers to revolve with little friction. In case you have no bit or auger which will make large holes, Fig. 302 shows how the difficulty may be overcome with a small bit, gimlet, or red-hot poker, by boring a number of small holes in a circle and then breaking out the centre-piece of wood; smoothing the inside with a sharp knife. In order that the holes in the bottom board shall be directly under those in the top, nail the bottom board to the top board with three wire nails, driving them in only just far enough to hold the boards together while the holes are being bored, as shown in Fig. 303. Since the
Top Board
fits over the side-pieces, and the bottom boards fit between the side-pieces, it is evident that the bottom boards are shorter than the top board by just the width of the two side-pieces. Be careful to allow for this width at the ends, when you nail the boards together, as shown in Fig. 303.
Figs. 302 and 303.
After the holes are bored through the two boards, nail the top board and bottom boards in place, as shown in Fig. 301.
You must, of course, put the bottom board with the holes in it, on top of the bottom board without the holes. This will give two sockets, in which to rest and turn the ends of the rollers.
Make the Rollers of Broomsticks,
if you can secure nothing better, but if you can find some old window-shade rollers they will probably be an improvement on the broomsticks, as they have metal sockets in which they will turn with much less friction than in the wooden ones described above.