[ 50 3 



Other judicious treatment, to which its hafty pro- 

 grefs may be attributed, and to which few planters 

 can or will attend. 



The growth of middle-aged oak is generally 

 from one inch i -third, to an inch in circumference 

 yearly ; between its twentieth and its hundredth 

 year, it fometimes exceeds this meafure ; and in its 

 fecond century falls within it. But as the folidity of 

 the Ihaft confifts lefs in its length, than in the fquare 

 of its diameter in the girting place, a fmall addi- 

 tion to the diameter there enlarges the fquare abun* 

 dantly. Wherefore, though the circumference from 

 the hundredth to the hundred and fiftieth year, 

 may not increafe fo fail as it did to the hundredth, 

 the folid contents will be increafing fafterj for as 

 the fquare of the diameter* 40= 1600 exceeds the 

 fquare of 24= 576 f, fo will the contents in the 

 150th year exceed the contents in the looth, when 

 its annual enlargement was i-8th of an inch greater. 



* Forty inches was the diameter of Fyfields Oak, in its i5otli 

 year _ , - 40 



1600= Its fquare. 



t Twenty .four inches diameter of the fame in its 1 00th year, 



24 

 X24 

 576 s= Its fquare, 



, ' Under 



