OF FRUIT AND FOREST TREES. 



the juices through the wound, caufes a more active vegeta- - 

 tion, and aiTiits nature more powerfully in healing the wound 

 at the time the fap is in full vigour, than when it is on the 

 decline, as in Autumn and Winter. 



It is alfo neceffary to remark, that both fruit and foreft 

 trees (particularly thofe which grow in the ihade) are very 

 liable to be affected with diforders proceeding from the 

 growth of liver- wort, and various kinds of mofs, that ad- 

 here to the outer bark of the tree, and frequently gain a con- 

 fiderable thicknefs, that not only prevents the natural flow 

 of the juices, but caufes a ftagnation in the circulation, and 

 brings on decay; which, after deflroying the outer bark, 

 penetrates, by degrees, deeper into the wood. Where this 

 circumftance is obferved, care fhould be taken to clear the 

 whole bark of the tree from thefe growths ; and where it is 

 infected, to fcrape or pare it away. When the body of the 

 tree is thus cleanfed from infection, the Compofition fhould be 

 applied, in a liquid ftate, to the parts fo cleaned, to clofe the 

 pores of the wood ; when the tree will foon acquire a frem 

 bark, with improved health and vegetation. I am confirmed 

 in thefe opinions by the many experiments and various trials 

 that I have made to afcertain, by the moft pofitive proofs, the 

 properties of this Compofition, before I ventured to offer it to 

 the public attention. Indeed, every year's experience has 

 increafed my conviction of its general utility, when properly 

 applied to the purpofes for which it is recommended. To 

 give a more complete illuftration of its virtues, and to place 

 the advantages arifmg from it in a ftronger light, I fhall beg 

 leave to ftate a few of the very numerous experiments that I have 

 made on the foreft trees in his Majefty's Gardens at Kenfing- 



Qj^z ton, 



