236 THE HOUSE I LIVE IN. 



being found dead in rooms which were tight, 

 where they had been burning charcoal. 



Our school rooms, our concert rooms, and 

 our churches, too how dangerous must it be 

 to crowd them, and sit for a long time in 

 them, as we sometimes do, without ventilation. 

 How easy is it to raise a window, or open a 

 door. And though we might thus expose an 

 individual, here and there, to take cold, how 

 much more is he exposed to injury, by sitting 

 in and breathing the bad air. 



FREE MOTION OF THE LUNGS. Not only 

 should the* air be good, but the lungs should 

 have free play in inhaling it. From youth to 

 maturity, we should follow no employment 

 which, for any considerable time, will cramp 

 or confine them. Neither should we sit or 

 stand too long in a bad position, as young 

 people are apt to do, in schools or factories. 

 Nor should our dress be so tight as to press 

 against any part of the chest. 



How much is it to be regretted that there 

 are parents, instructors, and even teachers of 

 military schools, who think it proper and ne- 



