Here let the Inventor speak for himself in the language of the 
patent last named. 
- build two furnaces side by side, each nearly square in its horizontal 
Section. 
the top, ner. 
tach furnace chamber there should be a partition of fire brick extending 
*cToss it from front to back and rising nearly to the top, dividing it into 
fro nearly equal parts. ‘The whole interior of the furnace should be of 
fire brick: The 
Wer chamber should be draught openings capable of adjustment to 
ort combustion in the lower chamber. ge 
3 “Xtending across the back of both furnaces, and opening into both by 
a ‘S @ mixing chamber into which all the gases from both urnaces 
enter in a highly heated state and mix and consume each other on their 
Way to the boiler and stack. This chamber should be about one-half the 
AM: JOUR. 8¢1.sECOND SERIES, Vor. XXX, No. 89.—SEPT., 1560. 
32 
sup 
