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wife vegetate. The common way is, to 

 have a principal drain, fix or feven inches 

 deeper than the ordinary drains, for the 

 latter to empty themfelves into. There 

 is no general rule, with refpe6t to the 

 proportion of ground which thefe mafter- 

 drains will ferve. Sometimes one is fuf- 

 ficient for ten acres ; but in this cafe the 

 land muft lay all one way, and the foil 

 muft be tenacious in its nature. When 

 the defcent lies different ways, there muft 

 be a principal drain to every Hope. But 

 where there is a good difcharge into a 

 ditch, which has likewife a good outfall, 

 many people prefer it to a mafler-drain, 

 becaufe any obftru6lions which may hap- 

 pen, are eaiier remedied -, for when a An- 

 gle drain is choaked up, the place is eafily 

 found out; but when many drains are 

 conne^fted together, it is often difficult to 

 find out the defeft. And fometimes the 



burrowing 



