76 



It then follows that in the pressed pulp there 

 remains. 



Sugar i.OO 



Azote combinations 0.25 



Ashes 0.25 



Cellular and other matters 4. 05 



Water 13.85 



moo 



8. OF ANIMAL CHARCOAL. 



Of its manufacture and revivification. 



Animal charcoal is obtained by calcining bones of 

 animals in closed vessels until all the gases have 

 escaped. The product of this calcining is a coal of a 

 deep black, light, porous. 



It is made in large kilns : and to calcine the 

 bones they are broken and placed in cast or sheet 

 iron pots, containing about one bushel. The pots 

 filled with the bones are piled on the bottom of the 

 furnace, so that they cover one another : the upper 

 pots being covered. 



In sugaries where they manufacture their own 

 charcoal, they have kilns that can hold 100 pots or 

 more, so that each kiln gives 3 or 4,000 pounds of 

 charcoal. When the charge is complete, the fire is 

 lighted and it is stirred so that are the pots gradually 

 acquire a deep red tinge. Once the fire is going, an 

 abundant quantity of gas is noticed coming out of the 

 pots, arising from the organic substances in the bones. 



