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THE POPULAR SCIENCE MONTHLY. 



arranged in alternation with the diffusers, revolving on a center. 

 As the pure water from an elevated tank percolates through the 

 mass of the two or three tons of sliced beets, under a pressure of 

 eighty pounds, the fluid contents of any one cylinder can be forced 

 into another through the communicating pipes, and thus — under 



Fig. 7.— Furnace fob supply op Limb and Carbonic- Acid Gas to Factory ("Journal des 



Fabricants de Sucre"). 



the combined influence of heat and pressure — the whole solution 

 becomes richly charged with sugar. From cylinder No. 1, which 

 contains the slices almost exhausted of their soluble contents, the 

 fluid passes into No. 2, where it acts on slices somewhat richer in 

 juice. So it goes on through the series, meeting in each cylinder 



