THE PRODUCTION AND USE OF LIGHT 



40. Construction of the Gasoline Lamp. We shall first look 

 at the construction of an ordinary hanging gasoline lamp 



(Fig. 16). At the top we notice the holder 

 containing the gasoline. From its bottom 

 a small tube extends downward, 2 ft. or 

 more. Connected with this tube and ex- 

 tending side wise from it is a small U-shaped 

 tube. The lower arm of this U-tube is 

 somewhat shorter than the upper arm. 

 This lower, shorter arm has a small open- 

 ing about the size of a pin hole in its end. 

 There is a valve in the lower end of the 

 upright tube just opposite the small U- 

 tube. This valve completely closes the 

 opening into the small U-tube when the 

 lamp is not burning. 



Supported below the upright tube and 

 extending out on the side opposite the 

 small U-tube is another and much larger 

 U-tube. The upper end of this second 

 large U-tube is entirely* open and is directly in 

 front of the opening in the end of the small 

 U-tube. The lower end of this large U-tube is 

 bent upward directly below the small U-tube 

 and carries all there is of a burner. But the 

 burner is very simple. The only really necessary 

 thing about the burner is a piece of fine wire 

 gauze which must be slipped over the bent-up 

 end of the large U-tube. Sometimes there is a 

 perforated framework to support the chimney. 

 The chimney must extend upward nearly to the 

 small U-tube. J IG - 17 - 



._. , __ ,- -r Mantle for 



41. Lighting and Burning the Gasoline Lamp. gas oiine lamp. 

 The lamp bowl is filled with 62B. oil. A small 



wire 10 or 12 in. in length is bent as shown by e, Fig. 16. 

 The lower end of this wire has been wrapped around some 



FIG. 16. Gasoline 

 lamp. 



