204 PRACTICAL FORESTRY 
the mountains of the Appalachian system the sugar- 
maple will grow and produce good sugar and sirup. 
From it many delicious confections may be produced, 
and for hot-cakes in cold weather no sirup can equal 
that of the maple because of its peculiar woodsy 
flavor. 
5. Restmn anp TURPENTINE 
In the inner wood of pine-trees there are ducts 
ealled resin-ducts, which are full of a substance known 
as crude turpentine or resin. When the bark is re- 
moved and the wood is cut, this material exudes in 
large quantities, and completely covers the wound. - 
Perhaps, indeed, this may be the purpose of this mate- 
rial, because it is not the sap of the tree. It is pro- 
duced locally in the inner wood by special organs or 
ducts. 
Immense quantities of crude resin are collected 
in the pineries of our South; in fact, this country sup- 
plies a large part of the world’s demand. 
It is generally called the naval-stores’ industry, 
because these materials are extensively used in filling 
the seams of wooden ships to prevent leakage; in 
oakum, which is used in calking, and on ropes to keep 
out the water and thus prevent rotting. For this pur- 
pose tar is used, and this is manufactured in another 
way, as will be explained later under the head of 
Wood Distillation. 
