61 



sufficient to keep the vessels moderately 

 open, in all the parts of the tree; in 

 which case, it Avill be found in a tole- 

 rably growing state. But this is not all 

 we have a right to expect from a tree, 

 in a good soil, and properly treated ; 

 for, in these, as well as in men, youth 

 is the season for exertion : and if we can* 

 not make the former thrive apace at that 

 period, it is seldom in our power to do 

 so afterwards, otherwise than by cutting 

 them down, and beginning the business 

 afresh. 



Reasoning from causes to effects, it must 

 be obvious that such thriving can never 

 be expected, while the sap is either too 

 little in quantity, or is obstructed in its 

 ascent; and still less, when both evils 

 co-operate. They may be called distinct 

 tjvils, though occasioned by the same cause, 

 namely suffering the tree to retain too 

 many branches* 



£ 



