prove very deftructive to thofe which have not 

 good Conftitutions : For as Gravel is the Life 

 of thofe Animals, by Virtue of which they di- 

 geft their Food, they cannot fubfift long with- 

 out it. 



Mill Walks are alfo very liable to create a 

 Taint of the like Nature, as being too much 

 expofed for want of Shelter, both to Winter's 

 Cold and Summer's Heat, befides the want of 

 Water in dry Summers; tho' itmuft be allowed, 

 that where the Situation is nigh Inclofure, 

 which generally afford Water, they are good 

 ones. 



Having fhewn the moft material Ways that 

 I am capable of how Fowl become tainted, I 

 ftiall obferve from the Whole, that it is much 

 the fafeft Way, as foon as ever a Taint is difco- 

 vered, to deftroy the whole Race of them, un- 

 lefs it be a trifling One, and the Fowl be of an 

 exceeding good Kind indeed by having all o- 

 ther good Qualifications. I doubt not but what 

 I have faid concerning breeding out of fought 

 and tainted Fowl, will meet with fome Objedi- 

 ons by fome Breeders, who may plead, that 

 they have bred very good Fowl from both 

 thefe imperfect Ways, but ftill it is no Contra- 

 diction to what I have faid, becaufe there is no 

 General Rule without fome Exception ; but this 

 I will venture to aver, that if the fame Fowl had 

 been bred out of in their Youth and Prime of 

 Life, the IflTue of them, with equal Feeding 

 and Management, would win twenty Mains fuc- 

 ceffivcly, were they to be decided againft fuch 



as 



