386 



PINUS PINASTER. 



pyramid. The soot is deposited either on the walls of the 

 chamber or on the flannel bag, the flannel acting as a 

 filter to the lighter part of the smoke, by retaining the 

 soot and allowing the heated air to escape. The soot is 

 detached from the flannel bag by striking the outside 



PTNUS LEMONIANA. 



smartly with a stick ; and, the door of the chamber being 

 opened, the lamp-black is swept out and packed in small 

 barrels. Tar is sometimes substituted for resinous straw ; 

 and lamp-black is sometimes obtained by burning resin 

 in a kind of lamp furnished with a chimney, which is 

 surrounded by a flannel, and which retains the soot. It 



