l6. YORKSHIRE. 275 



it is perhaps In any other; yet even here, the 

 plows of different makers pafs through the 

 foil with various degrees of facility and exe- 

 cution : neverthelefs, though I have paid 

 fome attention to the different makes, I find 

 myfelf entirely incapable of laying down 

 fuch particular rules of conflruftion as would 

 do my country any fervice, or my work any 

 'credit. Even the general principles of con- 

 ftruction I mufl mention with diffidence. 



The great difficulty, in the conflruclion of 

 a plow, is that of adapting it to all foils, in 

 all feafons, and to all depths. 



If the foil break up in whole furrow, every 

 inch of depth requires, in ftridlnefs, a fepa- 

 rate plow, or a feparate regulation. Here 

 refls the main objection to the winding 

 MouLDBOARD, which admits of no regulation 

 in refpe*5t of depth. 



If thefemi-nrc.b or hollow of the hindpart 

 t)f the mouldboard be raifcd fufRciently high 

 to turn a thick furrow completely, it is of 

 no ufe in turnino; a thin one. On the con- 

 trary, if it be brought down fufficienrly low 

 to nun a fhallow furrow properly, it is im- 

 T 2 poflible 



