992 



IRON 



tuyeres, which enter the top of the furnace just over the fire-bridge at an angle 

 of 30. The air forced into the furnace through the tuyeres serves to inflame an I burn 

 tho gases rushing out of the generator, and the direction of the blast throws the re- 

 sulting flame down upon the metal on the hearth, in front of the bridge. This iir- 



Eck's Gas Reverberatory Furnace. Front view 



Longitudinal Section. 



chest communicates, like the other one, by pipes, with the air accumulator of tho 

 neighbouring blast-furnace. The amount of pressure employed is about 4 Ibd. ; but 

 the supply of air, both to tho generator and tho inflammablo gases, admits of accurate 

 regulation by means of valves in the connecting pipes. There is an opening in tho 



