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burrowing of a mole will occafion a 

 lloppage. 



The method of opening the principal 

 drains is, to plough four furrows, throw- 

 ing two each way ; the two infide fur- 

 rows being ploughed deeper than the o- 

 thers. After the plough, the earth is 

 funk a fpit deep with a common fpadc, 

 and afterwards another fpit with a land- 

 ditching-fpade, called a griping-fpade. 

 Laft of all a fcoop is made ufe of, to rake 

 out all the loofe earth. This drain when 

 compleated is about two feet deep. The 

 common drains are begun, and finifhed, 

 like the principal drains ; but the fpit 

 with the common fpade is omitted j and 

 therefore they are not above eighteen 

 inches deep, two and a half wide at bot* 

 tom, and three and a half at the top of 

 the grip. Iri this proportion, the nar- 

 rower they are, the better. The drain is 

 C 3 filled 



