of Growing Timber Trees. 36*5 



Observations respecting Trees of different Lengths in the Bole. 

 Trees that increase annually 12 inches in height and one 

 in circumference, and have boles of different lengths, these 

 boles, if of the under-mentioned lengths, increase after the 

 rate of five per cent, per annum at the ages and heights un- 

 der mentioned, and ihey measure as under, viz. 



Contents. 



Years old. In. Ft. Ft. in. p. 



Trees with 12 feet boles at 46 their crirt 10 at 6 high, 8 4 



Do. 16 do. 43 do". 10 ;>t 8 do. 11 1 4 



Do. 94 do. 52 do. 10 at 12 do. 16 8 



Do. S3 do. 56 do. 10 at IS do. 22 2 8 t 



Do. 40 do. 60 do. 10 at 20 do. 27 9 4 



Do. 48 do. 61 do. 10 at 24 do. 32 4 O 



Whatever the lengths of the boles of trees increasing as 

 above maybe, the increase is 5 per cent, per annum one year 

 after their girt in the middle is ten inches, but not longer. 



But supposing that these trees have grown to 60 years of 

 age, and increased as above mentioned, their girt and con- 

 tents at that age would be as under, viz. 



Contents. 



Ft. in. p. ' 



Trees with 16 feet holes, 13 inches girt at 8 feet high, 18 9 4 



Do. 20 do. 12$ do, 10 do. 21 8 5 



Do. 24 do. 12 do. 12 do. 24 O 4 



Do. 32 do. 11 do. 16 do. 26 10 8 



Do. 40 do. 10 do. 20 do. 27 9 4 



This table shows that the advantage to be gained by prun- 

 ing trees higher than 32 feet, is not an object worthy of 

 consideration, if the trees are to be cut down at the age of 

 60 years. 



And if it should be found that the higher a tree is pruned 

 the slower it swells in the bole, perhaps a 24 feet bole may 

 measure as much at 60 years old as a 32 feet bole. If it 

 increases half an inch in girt in the last 36 years more than 

 the 32 feet bole increases in th$ same time, it will very 

 nearly equal it in measure. 



A 32 feet bole with a top from 20 to 30 feet high, with 

 many large lateral branches, is certainly a much finer object 

 than a forty feet bole with a top only twenty feet high, with 

 few and small lateral branches : and at sixty years old, the 

 former will have had to increase in the last twenty-eight 

 years, only one quarter of an inch in girt, more than the 



latter, 



