The Principles of Brooding. 



327 



♦C 



while the tank is being filled. To light the burner, open the wheel 

 valve and the control valve and allow the gasoline almost to fill the 

 generating cup; then close the control valve. Light the gasoline and 

 allow it to burn out. Open the control valve and hold a lighted match 

 over the top of the burner. This will give a bright blue, cone-shaped 

 flame which should never be turned so high as to show red. Regulate 

 to the desired temperature with the control valve. 



Wood or denatured alcohol is often used instead of gasoline to heat 

 up the burner when starting. The burner cup is filled with the alcohol, 

 which is set afire with a lighted taper fastened on an extension rod similar 



to those used on railroad cars. As soon as the alco- 

 hol has burned out, open the control valve and light 

 the gasoline vapor as above. 



There should be no danger in operating a gasoline 

 burner when ordinary care is exercised. The 

 common points of error which may result 

 in disaster are, (a) allowing too much gaso- 

 line to run into the generating cup (G. C. 



Fig. 104) ; (b) apply- 

 ing a match to the 

 generating cup be- 

 fore the control 

 valve . is closed ; (c) 

 attempting to light 

 the burner after it 

 has accidentally 

 gone out and the 

 bottom of the burner 

 box is covered with gasoline. With this type of heater, this occurrence 

 is very rare since the burner is placed back under the house where 

 the wind cannot reach it. Should the flame by any accident be extin- 

 guished and the burner become cool and so waste gasoline into the 

 burner box. the control valve should be closed as soon as it is discovered 

 and the gasoline allowed to evaporate entirely before any attempt is 

 made to relight the burner. As an extra precaution a basin may be 

 placed outside under the drip to prevent waste and also to avoid gaso- 

 line filtering into the soil. A tin flashing should be placed above and 

 below the burner box on the back of the house as an extra precaution 

 against fire. 



Should any difficulty be experienced in getting a large enough flame 

 to maintain the proper temperature under the hover during cold weather 



Fig. 104. — The Dangler Furnace and Laboratory Lamp 

 Burner No. 154. CV , control valve; GC, generating cup ; 

 O, small opening in valve seat, C, cone 



