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 [Fig. 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 strips to the inside of the can or mailing-tube. The lens jacket should fit loosely enough in the reflectoscope box opening so it will slide back and forth for focusing. Make a tin collar to fit around the jacket, and tack it to the front of the box, to prevent light from escaping ([Fig. 339]).
Before putting on the back of the reflectoscope box,
Putty up all Cracks between the boards in the top and front, to make the box light-tight; then
=Paint the Inside of the Box= and the cover boards with lamp-black thinned with turpentine, so there will be no reflections other than those produced by the lamp reflectors and the picture.
