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Ge re eR GR REN en ce OT Oe ne 
While in the earlier stages of combustion 
tures of refractory fire bricks will endure it, and the color seen 
throughout that portion of the furnace is of the purest white. 
In view of the facts already stated it is easy to understand 
=, it is that when the reactions described are once set up, the 
admission of a free current of atmospheric air should immedi- 
ately check the energy of the combustion and soon result in to- 
tal suspension of the peculiar energy of this farnace. The air 
Perature in the mixing chamber is reach 
ed, both these products 
Seen in great abundance. : 
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