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Article XXXVIII. 



On Ploughs y and particularly the Rev, Mr, Cookers 

 new Swing Plough, 



[By James' Adam, efq; to tlic Secretary.] 

 Sir, 

 T WAS favoured with your circular letter of the 

 -*- nth of Auguft, and alfo with your very polite 

 and obliging anfwer to mine, acknowledging at the 

 fame time the receipt of my book. I am much 

 flattered to find from you, that it has met with the 

 approbation of thofe Members of your Society who 

 have done me the honour to perufe itj and as I have 

 therein treated pretty fully of the form and mecha- 

 nifm of ploughs, as a matter extremely interefting 

 to every agriculturift, I Ihall beg leave to trouble 

 you with fome of my lateft experience and remarks 

 on that fubjeft, which I hope may become ufeful in 

 leading towards farther improvement. 



In the firft fedtionof my third efTay, when fpeak- 

 ing of ploughs, I have ventured to alledge, that, 

 though the mod common, they have ever appeared 

 to me the leaft perfe^l of all the inftruments of 

 husbandry ; and that I was of opinion, they were 

 not yet well underftood, either with refpecSt to their 



conftruilion 



