30 ECONOMICS OF FORESTRY. 



A similar industry is the tapping of the maple 

 for sugar, which is peculiar to the United Stales, 

 producing, with over 50,000,000 pounds of sugar 

 and 3,000,000 gallons of syrup, values to the extent 

 of $6,000,000 annually. 



Finally, by distillation of the wood itself and 

 condensing of the gaseous products, considerable 

 amounts of wood alcohol, wood vinegar, and ace- 

 tates, creosote and other tar oils useful in the arts, 

 are derived, adding another $3,000,000 or more to 

 the annual revenue furnished by our forest resource. 



In addition to these materials, which come from 

 the tree growth itself, there are many useful things 

 growing in the forest, which in our country have 

 hardly yet attained the dignity of industrial devel- 

 opment; although the distillation of wintergreen 

 oil from birch brush and the gathering of ginseng 

 occupy quite a number of people industrially, while 

 the huckleberry and cranberry crops furnish con- 

 siderable additions to the fruit supply of gardens 

 and orchards. 



How much may be obtained from the careful 

 use of these by-products of the forest may be seen 

 from the statement that in the Prussian state forests 

 the revenues for 1894-1895 were: 



For wood .... $ 14,500,000 

 For by-products . . . 1,000,000 

 For game ! 90,000 



It is seen that the by-products furnished about 

 7 per cent of the total income. 



