TO SHOW THREE DISPLAYS AT ONCE.
Fig. 1 is a section through the basement, ground floor and second floor of a store in which an arrangement of reflecting mirrors makes it possible for a person who is looking into the show window from G to see what is displayed on the floors above and below. First the window floor is cut out at A and the top at B. Mirrors, C and D, are adjusted on the back of the openings, inclined twenty to thirty degrees. Each mirror is the width of the opening, which would be about two-thirds the width of the window. The mirrors must be pivoted on adjustable frames so as to permit a proper setting for a good effect. The height of each mirror would be about five and one-half feet, and swung so that about three feet is inside the floor and ceiling line of the window. The large mirrors, E and F, are arranged as shown. That in the basement should reach nearly to the ceiling, and should be wide enough to take in the floor. The upper mirror is arranged similarly. The next move consists in so placing the goods in the ground floor show window that the edges of the small mirrors are covered, also the edges of the openings to the basement and top floor. The spectator standing on the sidewalk at G sees not only the goods in the ground show window, but his sight line is reflected from H to I and he sees all that is displayed in the basement. By glancing upward, his sight line is reflected to J, thence to K, and he sees the second floor display.
CHAPTER XIV.
MOTORS FOR MECHANICAL DISPLAYS.
The best motor for all general purposes is without doubt an electric motor. These can be procured at a moderate cost as small as ¼-horse power, which is sufficient for an ordinary mechanical effect.
THE ELECTRIC MOTOR
May be attached to the regular supply wire, and is so little trouble to the trimmer that it is preferable to all other motors whenever it can be used. It is frequently necessary
TO REDUCE SPEED
Of an electric or fan motor, and the simplest method is to attach incandescent lights to it. For a fan motor two 32-candle power incandescents will materially reduce the speed, as they cut off just the amount of power required to run them.
In towns where there is no electricity one of the following simple motors will be found serviceable and easily constructed: