30 Miracles Ahead! 



incandescent lamps mounted in a cove near the ceiling. Light- 

 ing could be automatic and governed by electric "eyes" sensi- 

 tive to outside variations in the daylight. 



Because they produce a rich glowing light that is cool, 

 fluorescent lamps should be used on desks and tables. They 

 are more efficient and cost less to operate than the incandes- 

 cent lamp. The fluorescent lamp consists of a long thin glass 

 tube containing mercury. It is coated on the inside with a 

 substance (phosphors) that fluoresces, or gives off light when 

 exposed to ultraviolet radiations. The light from the fluores- 

 cent lamp is nearly as white as daylight. You can't see ultra- 

 violet rays, but you can observe their handiwork. One type 

 of ultraviolet radiation from the sun produces sunburn. These 

 rays also help your body to produce Vitamin D. 



If the coating of phospors is not put on the fluorescent 

 lamp and a special glass is used for the tube, it then gives off 

 powerful germ-killing ultraviolet rays which will keep your 

 home free of harmful bacteria. 



"Laundering" the Air 



In the future your air-conditioning unit will also include a 

 Precipitron to eliminate dust from your home. This device for 

 "laundering" the air was invented in 1934 by Gaylord W. 

 Penney of the Westinghouse Research Laboratories. It con- 

 sists of tungsten wires and steel plates through which the air 

 is drawn. The wires positively charge the dust particles, which 

 pass on and stick to the negatively charged steel plates just as 

 iron fillings are drawn to a magnet. 



Penney reported that the Precipitron installed in his Pitts- 

 burgh home added only sixty cents to one dollar to his 

 monthly light bill. He expected the cost of operation to be 

 lowered by the development of more efficient equipment. 



The curtains in Mr. Penney's Precipitron-equipped home 



