130 THE WONDERFUL HOUSE THAT JACK HAS 



morning. If we stop coddling ourselves in this respect 

 and let the useful oxygen have a chance to do its mar- 

 velous part in our building during sleeping hours, 

 we shall certainly form one of the most beneficial 

 health habits. Every boy and girl who wants to 

 be as strong and good-looking as possible should sleep 

 with open windows. 



How noticeably healthy and rugged are the sailors, 

 farmers, omnibus drivers, and others whose work is out- 

 of-doors. It is a well-known fact that persons who 

 follow such vocations, and are not addicted to the use 

 of alcoholic drinks, usually enjoy perfect health. All, 

 of course, cannot engage in out-of-door occupations, 

 but, by becoming used to cold air and insisting that 

 the supply be as pure as possible, indoor workers may 

 enjoy much more of the same rugged health. 



It is a promising sign that the benefits of out-of- 

 door air are becoming more generally appreciated. 

 The ventilation of buildings has been much improved 

 in recent years. Hospitals adapted for out-of-door 

 treatment have been established in several states. 

 Occasionally we hear of people who are sleeping in 

 cots on their verandas. In cities, the practice of let- 

 ting babies, warmly wrapped, take their naps in their 

 carriages on the veranda or near a wide-open window, 

 is daily growing. The good results attending all of 

 such practices will surely extend them. 



What can we do to make the air of our homes, 

 offices, and workshops as pure as possible? When 



