tfjo Defcript'i07i of a Drain Plotigh* 



were employed to form drains with the plough at proper itl" 

 tervals : the imall drains were made at the dittauce of about' 

 nine yards from each other, in old furrows of the ground j 

 and about five inches deep : the fod, when cut out by ihc 

 plough, was of a wedge-like form, and turned out by it upon 

 the ridges of the land, entirely feparated from the drain or 

 gfltter. Thefc fods were afterwards divided acrofs, by a 

 ipade, into lengths of about two feet each, then tofltid by a 

 pitchfork into a cart, and placed in a heap in the fitld, alon^ 

 with ftrata of quicklime in a powdery ftate : the whole mal's 

 was reduced to a compoll bv the frolt during the winter, and 

 in the following fpring was laid upon the furface of the land, 

 and formed an excellent top-drefling. 



The water from the imall drains was direfted into larger 

 drains, made by lowering the fliare of the plough to the 

 deptli of nine or more inches. Little or no lofs of land arofc 

 from the imall drains, as natural graffeswere produced there- 

 in earlv in the fpring. It will be highly advantageous to re- 

 peat the operation every winter : it is eafily and expeditioufly 

 performed ; and no perfon, without an aftual experiment of 

 the facl, can form a fufBcient judgment of the great benefit 

 arifing to vegetation by the removal of cold ftagnant water, 

 during the winter, from land of every defcription. 



Defcrlption of the Dale of BriJ^eiuater's Drain Ploughf 

 (Plate VI r. fig. I.) 



AB, the beam of the plough. 

 CD, the handles, 



E, the {hare or fock. 



F, the coulter, or firft cutter of the fod ; which coulter 

 is fixed to the (hare. 



G, the other coulter, or fecond cutter, which fcparates the 

 fod from the land, and direfts it through the open fpace be- 

 twixt F and G. This coulter is connected with the fliare and 

 the beam. 



H I, the fiieath of the plough. 



K, the bridle or muzzle, to which the fwingle-tree is to 

 be fixed. 



LM, two wheels of caft iron, which may be raifed or 

 lowered by fcrews at N preifing upon the flat irons 00, to 

 which the axis of each wheel is fixed. Thefe wheels regu- 

 late the depth which the (hare is to penetrate into the earth. 



P, a chain with an iron pin, to move the fcrews at O. 



XLVI. De- 



