( «i ) 



parts of the land ufeful, and may dram with 

 much greater eafe. If you begin to throw the 

 ridges down, and continue to do that, you will 

 cover all the bed foil with the bad. 



When drains are obliged to be made very 

 deep, which can feldom happen unle-fs where 

 they are the principal, or outfalls, roundifli peb^ 

 bles are the bed materials to fill them up with 

 to prevent accidents. But U fuch pebbles can- 

 not eafily be come at, any fort of (tones may 

 anfwer the purpofe; as loofe ftones, of what- 

 ever figure they may be, can never adhere fo 

 clofely as to prevent the pafTage of the water. 

 With whatever materials you fill the drain, let 

 it be dug fquare till within a few inches of the 

 bottom ; when you may contrad it fuddenly 

 to a triangular form, like the ridge of a barn- 

 roof inverted. But in all drains made with 

 brick-work or mafonry, the circular form is to 

 be preferred ; as angles are fure to impede the 

 free difcharge of foil, and render the drains li- 

 able to be choaked. This circular form may 

 be given in moft foils by a fpade made in the 

 form of a tool much ufed by joiners, wood-car- 

 Yers and other artifans, called a gouge, by the 



Vol. II. E fhoving 



