22 



that each tree would occupy nine feet of 

 surface. Suppose again, we have trees 

 planted at three feet distance, and half of 

 them thinned out ; a person of the same 

 stamp would suppose the remainder then 

 to stand at six feet distance, or that each 

 'would occupy thirty-six feet of surface ; 

 when in fact, the quantity, in both cases, 

 would be just the same, namely a surface 



of eicrhteen feet. Such mistakes, how- 



ever, experience never fails to correct : it 

 is quite sufficient that a man shall once 

 in his life have either to plant or prune, 

 in the ways mentioned, or any other, 

 where the distances do not materially dif- 

 fer, and he will find the result so far con- 

 tradict his theory, that he will be set 

 right ; and it is next to impossible^ he should 

 ever afterwards forget it. 



Both these errors, our author has not 

 only fallen into, but persisted in. We have 

 noticed them in p. 6, 7, S6^ 37, 97, and 

 1 10, where they are asserted as facts, and 



