OP FRUIT AND FOREST TREES. 399 



Land Revenue OfficCy April 25^ 1789. 



Sir, 



We have received your letter of 

 yesterday's date, which contains a very clear and 

 satisfactory answer to our enquiries respecting the 

 effects of injuries done to the bark of Oak-trees, 

 and the means of preventing damage to the timber 

 from that cause ; and the specimens sent with your 

 letter afford the most convincing proofs both of the 

 destructive consequences arising from even sHght 

 injuries to the bark, when no means are used to 

 prevent them, and of the efficacy of your discovery 

 for preventing and curing defects in timber pro- 

 ceeding from that source : but we observe that you 

 have not given an answer to our enquiry as to the 

 expence which the application of the remedy you 

 have discovered would be attended with, by the 

 hundred, or thousand, or any given number of 

 trees, in case there should be occasion to apply it 

 to a very considerable number. We therefore re- 

 peat our request, that you will be so good as to in- 

 form us, as nearly as you can, whereabouts would 

 be the expence of such application, including la- 

 bour, materials, and all incidental charges ; but ex- 

 clusive of any reward to yourself for disclosing the 



