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*It; ‘*‘ewrequpn ‘*Lzesql7 stoutf11 30 4338g04 ;up At sundown, open the downstairs _ As the powerful fan pulls in cool In 3 minutes or less, the air in every windows and turn on the attic fan. _ night air, stale hot air is expelled. â€" room has been completely changed. A COMPLETE CHANGE OF AIRâ€"IN 3 MINUTES OR LESS! Why should your house be like a "bakeâ€"cven"â€"when all around you, waiting to be put to use, is Nature‘s cool, fresh night air. Harness that airâ€"bring it into your homeâ€"and you‘ll keep cool and comfortable during even hottest weather. Pulls in Nature‘s cool night air as it flushes out bhot, sticky air... Provides an entire night of restful sleep for less than the cost of an ise cream cone. ‘night air cooling system is one of the simplest home PUBLIC SERVICE COMPANY of Northern lIllinois cooling methods ever devised. And it is also one of the most effective. Powerful, slowâ€"speed fans with extraordinary air displacement qualities are available for all types and sizes of houses. Portable models may be used in the attic or in individual rooms. Builtâ€"in models are designed for use in attic windows or ventilators, and can be easily installed. Here is a wise investment that pays big dividends in cool nights of restful sleep. Investigate it now â€"enjoy it all summer long, for yearsâ€"to come. ; . . . and Electricity is cheap!