Cut Ventilator Holes 3 inches in diameter through the uppermost side of the box, near to the ends and bottom.
Figures 341 and 342 show
The Interior Arrangement of the reflectoscope. Place the lamps in the corners of the box, next to the front, and tack in back of them the pieces of tin for reflectors (A, Figs. 341 and 342). Bend the reflectors to the curve shown.
If Oil Lamps are Used, their tops will project through the ventilation holes, as shown in Fig. 342. These openings must be inclosed with
A Hood which will Conceal the Light, yet allow the heat to escape. The most satisfactory arrangement is that shown in Figs. 339 and 342. A baking-powder can with its bottom removed (B) is slipped over the lamp chimney and fitted into the ventilation hole; then a tomato-can (C) is inverted over the top of the can and fastened in the slotted ends of three wooden peg stilts (D, Fig. 340), and the pegs are fitted into holes made in the top of the box (Figs. 339 and 342). Fasten the can in the slots of the stilts with tacks (Fig. 340).
If Electric Light is Used, the hooded ventilators may be omitted. Any boy who understands the wiring of electric- lamp sockets, plugs, and drop-cord will know how to wire up the reflectoscope.
Mount the Lens in a can or mailing-tube jacket (Fig. 343). If you use a can, remove the bottom. If the lens is smaller in diameter, make a band of cardboard strips to fit around the edge, as shown in Fig. 344, and glue these
