WATER is extremely important to health. One does not have to travel very far to realize the great advantage that comes in combating disease because of the growth of public health practices of pure water supply and of sewage disposal systems. Several diseases have practically been eliminated since pure water supplies have been regulated by laws. . .
IF ALL the little air sacs in the lungs were flattened out the surface area would be about the size of seven large bed sheets or the size of a 15' x 30' room. Every hour, at rest, the lungs carry in and out about 1,500 gallons of air. . .