36 



THE PRODUCTION AND USE OF LIGHT 



common kerosene lamps. When understood, it is easily 

 handled and has found wide use, especially in lighting stores 

 and large public rooms where electricity or gas is not 

 available. 



43. Modified Forms of the Gasoline Lamp. In the form of 

 lamp just studied, the gasoline is contained in a reservoir above 

 the lamp. The gasoline flows down the 

 tube by the force of its own weight. In 

 many gasoline lamps the oil is stored in a 

 bowl below the burner and is forced up into 

 the burner by means of compressed air. 



A slightly modified form of this lamp is 

 often used when a complete lighting system 

 is to be installed in a store or building (Fig. 

 18). In this case any number of lamps 

 may be joined in one system. The gasoline 

 is stored in a stout iron cylinder which 

 may be placed in the basement or at any 

 distance desired from the lamps. Leading 

 from this tank is a wire-like tube. This 

 tube connects with the lamp which is in 

 all respects similar to the lamp studied. 

 By means of a bicycle pump, air is com- 

 pressed in the top of the cylinder. The 

 pressure of this compressed air forces the 

 gasoline up through the tube to the lamp, 

 where it is heated and turned into vapor and then burned 

 exactly as in any other gasoline lamp. 



The advantages of this system are: (1) The gasoline may be 

 removed to any safe and convenient place; (2) any number 

 of lamps may be attached to the tube leading from a single 

 tank; therefore an entire building can be supplied from one 

 tank; (3) the whole apparatus is very light and is easily 

 moved from place to place. 



While this system has been used extensively in light ing stores, 

 and other public and private buildings, it has been found to be 



FIG. 18. Gasoline 

 lamp tube system. 



