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the Immediate and Full EflTect of Wood, that is, trees com- 

 plete and perfect in all their parts, without the loss of the 

 time required to replace the parts, when so defaced and mu- 

 tilated. In this way likewise, a certain and successful prac- 

 tice will be established, instead of one that is fortuitous. To 

 which it is pleasing to add, that the same system, that gives 

 picturesque effect, conjoins utility with ornament; for by 

 following it out, we shall insure to our trees uniform health, 

 and progressive vigour, and, by consequence, sound and 

 valuable wood. 



Such is the general theory, which I venture to suggest, for 

 the improvement of the art, and the guidance of the planter. 

 The proposition, as I conceive, has been enunciated, and ex- 

 ammed in its several bearings, with sufficient accuracy, in the 

 foregoing part of this Section. The more brief and popular 

 modification, now given, of protecting and non-protecting 

 properties, is not perhaps strictly philosophical ; but it is 

 adopted merely on account of its simplicity, and for the pur- 

 pose of accommodating the theory to practice. These pro- 

 perties, I am aware, are acquired by trees, solely in conse- 

 quence of differences in their situation ; and for that reason 

 it might have been better, if terms could have been found, 

 having a reference to what the tree is, or to the conditions 

 that have made it so, rather than to any future uses, which 

 the character thus acquired is considered to serve. But they 

 may be defended precisely on the same grounds, as the terms 

 " conducting" and " non-conducting," as applied to certain 

 substances, capable of receiving and transmitting the elec- 

 tric fluid, which were first invented by Disaguliers, and have 

 been since admitted into the philosophical nomenclature. 



The above practical view, however, with the illustrations 

 already offered, cannot well mislead us. as they are founded on 

 admitted doctrines of phytology, and the laws of nature. If 

 such a mode of execution be superinduced upon it, as shall 

 furnish to the tree a competent supply of sap, at the critirni 



