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246 B. Silliman, Jr., on the Combustion of Wet Fuel. «— 
DESCRIPTION OF THE FURNACES. 
1st, Furnace for combustion of wet tan, sawdust, he. 
Fig. 1, is a horizontal section of a furnace constructed accord- 
ing to the specitications of Thompson's first patent, (issued 
April 10th, 1855). . 
Fig. 2, is a vertical section of the same in the line vy, of 
figure 1. 
Similar letters indicate corresponding parts in both figures. 
TILED 
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A 
The furnace shown in these figures has three square or oblong 
fire chambers, A, A’, A”, side by side, experience having sbow? 
that not less than three compartments are required to secure the 
t results in the practical working of the furnace, ‘although 2 
some cases two may suffice, but frequently more than three are 
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