Chap. XXIII. Of the Hoe-Plough, &c. 407 



I have alfo made ufe of it for the fame Purpofe in 

 the Middle of a cloddy Field, where it pulveriz'd 

 the Clods fo effectually, that the Benefit of it might 

 be plainly diftinguifh'd by the Colour and Strength 

 of the Two following Crops, different from the other 

 Parts of the Field adjoining on both Sides, whereon 

 the Roller was not drawn. 



But crufhing has fuch a contrary Effecl from fqueez- 

 ing, that if this Roller fhould be us'd when the Land 

 is moift, it would be very pernicious, by unpulverizin^ 

 it ; of which I am fo cautious, that fometimes I let 

 the Roller lie ftill for a whole Year together. 



There is alfo a long triangular Harrow, which is 

 fometimes ufeful in the Intervals when the Earth is of 

 a right Temper betwixt wet and dry ; but there is no 

 need to defcribe it, and I fcarce ufe it once in Two or 

 Three Years. 



The Diameters of the wooden and iron Pins and 

 Screws, with their Holes, and the Sizes of the Nails 

 to be made ufe of in all the defcrib'd Inftruments, I 

 leave to the Difcretion of the Workmen, who, if they 

 are Matters of their feveral Trades, cannot be ignorant 

 of fuch Matters. 



Fig. 7. and Fig. 8. (hew the Lands of Turneps 

 mention'd at the Beginning of this Work. 



Qd* AN 



