26 GOOD HEALTH 



4. How wide open should the windows be? 



5. Can you always get enough fresh air by leaving the door open 

 into the hall? 



6. If the door is opened into the hall what else should be done? 



7. How can you tell when there is a draft in a room? 



8. Why is a draft dangerous? 



9. How can you open the windows so that there will be no draft? 

 10. What is the best way to heat and ventilate a house? 



