204 



FORESTRY IN THE UNITED KINGDOM. 



tables. In this manner, the yield has been estimated which 

 may be expected from British woodlands if treated systemati- 

 cally and according to correct sylvicultural methods. That 

 yield depends, of course, on the particular class of timber 

 which it is proposed to grow and on the method of treatment, 

 but it would lead too far to give here all possible cases. Hence 

 the simple method of bigh forest has been selected as applied 

 to larch, ash, Scotch pine, spruce, beech and oak, and the 

 returns determined which they are likely to give if planted on 

 average forest land. 



It has been assumed that timber of some size is wanted, and 

 that the woods are finally cut over : 



In the case of larch at the age of 70 years. 



These rotations are about the most profitable in the case of 

 high forest. As firewood is at present of little value, it has 

 been left altogether out of the account. 



The following returns may safely be counted on in the case 

 of average forest land : — 



Eetuuns of One Ache of Larch Wood. 



20 cubic feet quarter 

 girth measure- 

 ment at 

 130 ditto 



330 ditto 



360 ditto 



360 ditto 



= 3,900 ditto 



