SUGAR AND SUGAR MAKING. 109 
For the purpose of evaporating sorgho juice, on a limited 
scale, I think it would do good service; the fire only 
strikes the bottom, and the syrup, or sugar, is discharged 
at a moment’s notice. I should recommend it to such 
farmers as do not intend putting up a full train. 
BAG FILTERS, 
Where white pure sugar is wanted direct from the cane, 
a refining process is required, similar to that employed in 
refineries in the city. The cane juice, after defecation and 
clarification, at a density of 12° or 13° B. or even as 
high as 24° or 25° B., is run through bag filters, which are 
made of a peculiar kind of cotton duck; they consist, 
simply, of a large bag, usually a yard wide, and five or 
six feet long. This is gathered together closely, and 
drawn through a sheath of the same length, (like a cut 
of leather hose pipe, only made of porous flax bagging,) 
