The Principles of Bkuodixg, 



335 



box thoroughly and allow a little time to elapse before igniting in order 

 that the vapor may escape from the heater drum, thus avoiding an 

 explosion of the gas. 



4. The temperature of the house outside the hover is quite largely 

 controlled by the glass and cloth window openings, which should be 

 adjusted to suit the weather and the direction of prevailing winds. 



5. Always extinguish the burner and shut the wheel valve when 

 filling the supply can, and guard against filling the tank to over- 

 flowing. 



6. When lighting the burner, do not fill the generating cup to 

 over-flowing, and do not ignite the burner while the control valve 

 is open. 



7. Keep the gasoline supply underground or in a shaded location to 

 prevent loss by evaporation. 



8. It is well to keep a few pieces of asbestos wicking for repacking 

 the burner if occasion should demand it. 



9. To avoid delay, it is well to have an extra burner on hand to replace 

 one which may fail to work properly. 



10. While there is less danger from fire with gasoline when used 

 as here recommended, nevertheless it is well to be prepared for fire by 



Fig. 109. — A summer house for cockerels 



