1 1 8 Physiology. 



vestibules at entrances, and build special ducts by which 

 fresh air may enter, and heat it properly on its way in. 



To Air a Room without Draft. To introduce fresh air 

 into a room without having a draft, a good plan is to get a 

 board four inches wide and as long as the width of the 

 window sash. Raise the window, place the board under 

 it and shut the window down upon the board. This will 

 allow air to enter between the upper and lower sash, and 

 it will be directed toward the ceiling. This is of double 

 advantage; in the first place, it does not strike any one 

 directly ; in the second place, it mingles with the warm air 

 of the upper part of the room before it reaches us. 



Wearing Slippers. In rooms heated by stoves or grates 

 there is always more or less cold air moving along the 

 floor. Wearing slippers in such a room causes many per- 

 sons to take cold. The ankles have been warmly dressed 

 through the day and while the person was more active. 

 Especially if one is studying there is a tendency to draw 

 the blood away from the feet and make them cold. It is 

 restful, in the evening, to take off the shoes that have been 

 worn during the day ; but, for most persons, it would be 

 better to put on a pair of loose shoes so the ankles will be 

 protected. The floor is usually the coolest place in a room. 

 In sitting in a room heated by a grate, or stove, the head 

 usually gets the most heat, and the feet the most cold, just 

 the reverse of what it should be. If much heat escapes 

 from a furnace, the floor may be warm. Those who use 

 stove heat in loosely built houses, learn to keep the feet up 

 on a stool when sitting in a room in cold weather. 



Ventilation of Cellars. The cellar is the source of con- 

 tamination of the air of many houses. Of course a cellar 



