CHAPTER. XX: 
ANIMAL CARBON, OR BONEBLACK. 
Filtration—Animal Charcoal or Boneblack—Mode of preparing 
it, and the Condition in which it is employed in this Process— 
Properties of the Charcoal in this form—Mode of using it—Its 
Action—Use in removing the Extractive Matter and Harsh 
Flavor—Decolorizes—Promotes Crystallization—Removes any 
Excess of Lime, Tannin, etc., etc.—Separates all Soluble Sub- 
stances mechanically suspended in the Liquid—Mode of 
restoring the Powers of the Charcoal. when exhausted — Dif- 
ferent Modes of Reburning—New Method of Reyvyivification— 
Substitutes for it in Filtration. 
AFTER defecation by the means indicated in the foregoing 
chapter, the cane juice is beautifully clear, and apparently 
free from all impurities. It is not entirely pure, however, 
for there still remains a little of a harsh vegetable flavor 
due to extractive matter, which is separable neither by the 
process of defecation, nor by the action of heat. The 
entire removal of this is the primary object sought in the 
peculiar filtration to which the syrup is now to be subjected. 
This done, it is evident that a syrup so prepared is a 
refined syrup of the first quality. It should be even supe- 
rior to the best refined syrups of the market, because a 
long and tedious series of operations, including dilution 
with water, clarification, filtration and reboiling, as prac- 
ticed by the refiner upon the crude article, is not only made 
unnecessary, but also the waste, and the injurious effects 
resulting thereby to both syrup and sugar, are avoided. 
( 140 ) 
