61 
oe The trees will endure severe pruning with little apparent 
injury. One-third of the leaves and young shoots ma 
* DISTILLATION. 
“ In the native forests in Formosa, Fukien, and Japan, camphor 
is distilled almost exclusively from the wood of the trunks, roots, 
and larger branches. The work is performed by hand labour, and 
the methods employed seem rather crude. Different methods of 
distillation are employed in different districts, but those in use 
in the province of Tosa, in Japan, appear to be the most skilful. 
The camphor trees are felled, and the trunk, larger limbs, an 
sometimes the roots, are cut into chips by hand labour with a 
sharp concave adze. 
[1j 
stream which runs out of a hole in one side. The smaller one 
is inverted with its edges below the water, forming an air-tight 
chamber. This air chamber is kept cool by the water falling on 
the top and running down over the sides. The upper part of the 
air chamber is sometimes filled with clean rice straw, on whic 
the camphor crystallizes, while the oil drips down and collects 
on the surface of the water. In some cases the camphor and oil 
are allowed to collect together on the surface of the water and 
are afterward separated by filtration through rice straw or by 
ressure. 
“About twelve hours are required for distilling a tubful by. 
this method. Then the chips are removed and dried for use in 
not too great, producing a steady supply of steam ; (2) the steam 
L t t ; im 2 ; ; = $ 
