71 



a bed of thirty feet, provided the water 

 flows in both cases with the same depth 

 and velocity. The quantity of water 

 will depend, in a certain degree, upon the 

 length of the bed, but not upon its breadth. 

 A broad bed will use the water a longer 

 time, but will not take more water. 



P. 85, " In erecting wears, &c/* Mr. 

 B. says, " Clay must always be avoided; 

 " it is worse than the common soil.'* 



Clay has almost invariably been used 

 for this purpose in Gloucestershire, and 

 is found to answer very well, where it is 

 not outside work, and exposed to the 

 frost. 



P. 98, Mr. B. says, " The trenches, 



" drains, &c. will, if the land is pretty 



•* firm, by thus repairing, do their oiHces 



K 2 " three 



