National Geographic : 1931 Jan
"j THIS IS THE FOURTH OF A SERIES OF ADVERTISEMENTS DEALING WITH ULTRA-VIOLET RADIATION IN THE HOME **" Questions and Answers about the GENERAL ELECTRIC SUNLIGHT MAZDA LAMP Question Why do we have "sun starvation"inwinter? Answer Because no matter how brightly the winter sun may shine, it contains only a very small percentage of the normal beneficial ultra-violet found in summer sunlight. This is due to the fact that in winter the sun is at relatively low alti tudes, and consequently the sun's rays must penetrate a greater mass of atmosphere to reach us. Question Why does General Electric in its adver tising stress the need of ultra violet for growing children? Answer Because ultra-violet radiation develops Vitamin D-the sunshine vita min. This is the antirachitic vitamin and during the pre natal and the growth years of life, it is an absolutely essential element for building strong bones andfor sound healthy development. Question What about older children and the "grown-ups" of the family? Can they benefit by ultra-violet radiation? Answer Every member of the family needs sunlight. Though ultra-violet rays pene trate the skin no deeper than the thickness of this sheet of paper, they work deep changes through the entire body. They aid in maintaining health by building up resistance to disease. Question Why does General Electric emphasize the safety of its G. E. Sunlight MAZDA Lamp (Type S-1)? Answer Because the bulb of the G. E . Sunlight MAZDA Lamp is made of special glass which filters out, as does the atmosphere in Nature, near ly all radiation not found in the best summer sunlight. Question How does the G. E. Sunlight MAZDA Lamp differ from the ordinary MAZDA Lamp? Answer Though it embodies the simplicity and economy of the modern MAZDA Lamp, the G. E . Sunlight MAZDA Lamp differs markedly from the incandescent lamp in the follow ing respects: It contains a pool of mercury (see illustration) a part of which vaporizes when the filament heats and forms an arc between the two button-like electrodes. Secondly, it will not fit the ordinary lamp socket, not only because its base is larger, but because a transformer is re quired to adapt the voltage in your home to that required by the lamp. Standards or fixtures designed for the use of the G. E . Sunlight MAZDA Lamp are made Mercury is one of the most important and unique fea tures of the G. E. contains a small free pool of this element. When the lamp filament is lighted a portion vaporized and an arc is formed be tween the elec trodes just above the V of the fila ment. This arc furnished the ultra violet rays so necessary to glowing health. But the G. E . Sunlight MAZDA Lamp adds safety to ultra-violet efficiency by carefully filtering out by means of a special glass bulb, practically all radia tions not found in the best midsummer sunlight. Look for the pool of mercury when buying any sunlamp equipment as well as the General Electric Trademark (GE) in a circle. by General Electric and a num ber of other manufacturers and are offered for sale at your near est electrical or department store. Question May the G. E. Sun light MAZDA Lamp be used as a reading lamp or for other lighting uses? Answer Yes, indeed. Not only does the G. E. Sun light MAZDA Lamp give an un usually fine light for reading, sewing, and similar occupations, but each member of the family may be irradiated as he goes about the ordinary pursuits of the day. Children may be irradi ated as they dress in the morn- ing. Men may shave under this "sunlight." Women find the G. E . Sunlight MAZDA Lamp the ideal sewing light. Its soft, warm ing radiance is equally desirable for relaxation. Adults often like to "treat" themselves while reading in bed. Question Because of these many additional ad vantages, is the G. E. Sunlight MAZDA Lamp lacking in ultra violet? Answer Decidedly not. At a distance of three feet the G. E . Sunlight MAZDA Lamp provides the same ultra-violet effectiveness as is found in mid day, midsummer sunlight. Question What does the medi cal profession think of the General Electric Sunlight MAZDA Lamp? Answer Ask your family physi cian. The General Elec tric Sunlight MAZDA Lamp is sold in accordance with require ments of the Council of Physical Therapy of the American Medi cal Association. Many physicians are prescribing units using this lamp, for shut-ins, pre-natal cases, and children, as well as a tonic for well people-that they may remain well. Question Where may I learn more about the G. E. Sunlight MAZDA Lamp and its many advantages? Answer By writing to the In candescent Lamp De partment of General Electric Company, Nela Park, Cleveland, Ohio, or by visiting your nearest department or electrical store, or local lighting company. THE INCANDESCENT LAMP DEPARTMENT OF GENERAL ELECTRIC Co., NELA PARK, CLEVELAND, OHIO. Please send me, without any obligation, full information about the General Elec tric Sunlight MAZDA Lamp. Name Address City GENERAL ELECTRIC SUNLIGHT MAZDA LAMP Join us in the General Electric Program, broadcast every Saturday evening over a Nation-wide N. B. C. Network.