PRODUCTION OF HEAT 



69 



Courtesy of American Steel Foundries 

 ::.! MOLTEN STEEL FLOWING FROM A BLAST FURNACE 



The liquid steel is here conducted by a duplex spout into two 20-ton 

 ladles, ready for casting in the molds. 



Production of Heat. Heat may be produced in several 

 different ways, but the most common way is by burning. 

 Our houses are usually heated by burning wood or coal. 

 If we wish the fire in the stove to burn more brightly we 

 open the draft ; if more slowly, we close it. Apparently 



