342 OBSERVATIONS ON THE DISEASES, &c. 



think thefe remarks can be of any fervice, you have my per- 

 miffion to make any ufe of them. 



I am, dear Sir, 



Yours fincerely, 



(Signed) JOHN WEDGWOOD. 



Extract of a Letter from Thomas Davis, Efq. Author of the 

 Agricultural Survey of Wiltjhire, 



June 28, 1801, 



I WAS happy in having an opportunity tfhe other day of 

 ihewing the effects of your plafter (in recovering the bark of 

 oak-trees of 4 or 500 years old, which had begun to rot up- 

 wards from the ground, and is now recovering downwards 

 very rapidly,) to Lord Spencer, who was both pleafed and 

 aftonifhed with it. 



" You may at any time refer to me for proofs if you want 

 them. I made a bold experiment feven years ago on an Oak- 

 tree 40 feet high and i£f feet round, worth £.80 at leaft to 

 a Carpenter to cut to pieces, and fuch a tree as the King has 

 not ten in his dominions. There was a craze in the fide of 

 it, which looked like a fhake, and fpoiled its beauty. I cut 

 out the bark on each fide the nffure fo as to make the opening 

 6 or 7 inches wide. I coated it well with plafter, and it is 

 now perfectly united and found." 



*' In the annexed Figure, a re- 

 prefents the FifTure which iep evi- 

 rated the Bark, but did not affect 

 the wood." 



