VENTILATION 



179 



FIG. 140a. 



FIG. 1406. 



What is the effect on the ventilation of a room, 1. If the air enters at the floor 

 and passes out on the opposite side at the top? 2. If the air enters on 

 one side of the room near the top and passes out on the opposite side near 

 the top? 3. If the air enters about half way from the ceiling on one side 

 and leaves the room on the opposite side at about the same distance from 

 the top? 4. If the air enters from the side wall a few feet from the ceiling 

 and leaves on the opposite side at the bottom? 5. If the air enters from 

 the floor on one side of the room and passes out on the opposite side of 

 the room near the floor? 6. If the air enters and leaves on the same side 

 of the room? 7. For good ventilation, what is the best way for air to 

 enter and leave a room? 



