594 



Our Surroundings 



The soft, even glow which lights up the outer walls of some build- 

 ings comes from concealed floodlights. Floodlights are also now 

 used to illuminate playing-fields for night games of baseball, foot- 

 ball and other sports. Have you ever seen a game of baseball or 

 football at night, when floodlights made it possible to see the 

 players as well as by broad daylight? 



Boiler top cover 

 Motor compressor 

 Insulation- 

 Steam outlet 



-* water ieve-i 

 *I . Low- water 



Refractory bricks- 

 Combustion chamber 

 Refractory nozzle-**^ 



Secondary air 

 distributor 



Brown Brothers. 



CONSTRUCTION OF A MODERN OIL BURNING FURNACE 



This is the latest type, in which the furnace and burner are built together as a unit. 

 The "gun" in this burner shoots downward, not horizontally, as the older "gun-type" 



burners do. 



Oil Burners. For several generations, coal has been prac- 

 tically the only fuel burned in furnaces. Within the last ten years 

 or so, however, the use of fuel oil for heating plants has become 

 practical, and its use is increasing rapidly. 



Fuel oil, often called furnace oil, is one of the products of 

 petroleum. It requires a special type of burner in which the oil 



