OCR Text |
Show CHANGEABLE ELECTRIC SIGNS. Brilliant effects for electric signs are now to be readily obtained with little eost by the use of small colored transparent trans-parent caps, which fit over the rounded ends of the incandescent bulbs. . This permits the owner of a changeable electric elec-tric sign to alter the legend at will and to indulge in the use of colors without the necessity of keeping on hand a large supply of colored lamps, some of which are . very expensive. -Scientific American. |