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lo perceive soiiie symptoms ol' tlie public attenlion being 

 roused to physiological inquiry, on this subject : but nothing 

 less than an Institution for the encouragement of Arboricul- 

 ture exclusively, will supply this desideratum in the educa- 

 tion and intelligence of the country, and place the art on that 

 footing of respectability, to which no one will deny it is en- 

 titled by its importance. 



In what, then, it may be asked, does a proper selection of 

 subjects consist? A proper selection of subjects consists, as I 

 conceive it (exclusively of picturesque considerations,) in two 

 things especially : First, in a judicious adaptation of trees to 

 their proper soils; and secondly, in taking care, that the 

 trees so adapted possess as great a share of the protecting or 

 non-protecting properties, as is fairly required by the situa- 

 tion of exposure, or of shelter, in which the trees are to be 

 placed. Of these two points the former has already been 

 sufficiently illustrated, in the course of the foregoing discus- 

 sion on the want of adaptation. As to the latter, it may be 

 observed, that much will depend, in applying it to practice, 

 on the particular objects of selection, which the planter may 

 have in view. 



If his object be single or detached trees, and such as are 

 intended to be set out in trying exposures, the acquisition of 

 the protecting properties must be the chief end and aim of 

 his selection ; and the trees must have made the acquisition 

 in sites, as much exposed at least as those to which they 

 are to be removed. He may rest assured, in this case, that 

 his success or miscarriage will be in the precise ratio, in 

 which his subjects may have obtained these indispensable 

 prerequisites. If fully obtained, their progress will be visible 

 from the beginning; but if imperfectly, their progress will be 

 retarded, until the deficiency be made up. In other words, 

 as planters do not always follow nature, in the choice of their 

 subjects, they need not be surprised, if trees planted out in 

 such exposures (supposing them to live at all.) should continue 



