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Rh sudden. But even they should not be afraid of cold, for this cold can be speedily got rid of. Now-a-days, in Europe, the houses for consumptives are being built in such a way that they may get fresh air at all times. We know what terrible havoc is wrought in India by epidemics. We should remember that these epidemics are due to our habit of defiling the air, and of inhaling this poisonous air. We should understand that even the most delicate people will be benefitted by systematically inhaling fresh air. If we cultivate the habit of keeping the air pure and of breathing only fresh air, we can save ourselves from many a terrible disease.

Sleeping with the face uncovered is as essential as sleeping in fresh air. Many of our people are in the habit of sleeping with the face covered, which means that they have to inhale the poisonous air which has been exhaled by themselves. Fortunately however, some of the air from outside does find its way through the interstices of the cloth, else they should die of suffocation. But the small quantity of air that gains entrance in this way is altogether inadequate. If we are suffering from cold, we may cover the head with a piece of cloth, or put on a night-cap, but the nose should be kept exposed under all circumstances.

Air and light are so intimately connected with each other that it is as well to speak a few words