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tions, never to let the water of any brook or 

 river intermix with that of the canal, unlets 

 to fupply the requifite quantity; fome pecu- 

 liar contrivance was neceiTary to prevent the 

 canal, in this junction with the river, from 

 being affected by its rifing or falling with 

 floods, &c. For this purpofe, the wear was 

 executed, which is minuted in the annexed 

 plan, marked K: It is a hexagon, of three 

 hundred and fixty-lix yards circumference. 



of his level ; for the tool muft be worked to the 

 head through the whole. When thirty or forty 

 yards are thus finifhed with Fig. 3. the fcoop, Plate 

 VI. Fig. 4. mult be ufed to clean the bottom of 

 the narrow drain. Then (if the turf is found) lay 

 the pieces with the grafs fide downwards, over 

 the narrow drain ; fee that they fill the trench in 

 widths and join clofely to each other; then 

 throw in the earth that was before taken out, and 

 the work is done. But if the turf is not firm, 

 before you put it in, lay fmall (ticks acrofs, in 

 this manner, Plate VI. Fig. 5. 



I have, even where no turf could be had, co- 

 vered drains in fields to be plowed, with flicks, 

 in the above way, and over them put in ru flies, 

 brufhes, wood, and then the earth over all, and 

 this with great fuccefs. But the method before 

 mentioned, where only the turf is ufed *, is firm 

 and lecure ; and, I dare vouch, will laft thirty 

 , if carefully executed at firft. I have 

 drained feveral acres after this method, and my 

 labourers finijb thefe drains for an halfpenny a 



yard f . The land, before too wet to bear a 



.» 



• Small Ricks acrofs certainly are an advantage even where 

 the fod-: ire firm, buc are not neceflary. 



.... 1 ny a yard, three men can earn 7s. a day. 



hoi 



