of Growing Timber Trees. 383 



trees of different rates of growth, that are not intended to 

 stand beyond the age or sixty years. 



In the preceding tables the trees are supposed to be mea- 

 sured to the top of the leading shoot, but in the following 

 tables only to the height of their boles of 24, 32, and 40 feet. 



Tables showing the Increase of Boles of Trees of different 

 Lengths, 

 If a tree has increased twelve inches in height and one in 

 circumference annually, until it is twenty-four years old, it 

 will then be twentv-four feet high, and three inches girt at 

 twelve feet high; and supposing that in process of time this 

 tree be pruned up so as to leave the bole twenty- four feet 

 high clear of branches, and that it continue increasing one 

 jnch In circumference annually, the rate per cent, per annum 

 of its increase will be as under, exclusive of the increase of 

 timber in its top and lateral branches. 



TABLE X. 



But 





