b / - 
XX ANE Q\ : S SN 
WSS NS 
Sw WN S 
STS 
Fig. 4 is a front sectional view of the same, showing the com- : : 
bination of two double furnaces, 
Fh 
S 
® 
Ee 
o 
5 
ror 
t 
8 
= 
= 
3S 
Ey 
- Fig. 5 is a horizontal view of 
mixing chamber Mand flue F 
