Chap. XX. Of the Drill-Boxes. 341 



therefore, tho' we can increafe the Proportion of Seed 

 by enlarging the Notches, or perhaps by doubling 



their 



different Numbers in it: Or if we would have Three Sets, we 

 need only make Ufe of Two fuch Wreaths, and let the Spindle 

 be long enough to receive them. So we may ufe which Set we 

 pleafe. 



Tho' feveral Sets of Notches may be ufeful to thofe who drill 

 many Sorts of fine Seeds different in Magnitude in a very great 

 Degree; yet I never found more than one Set of Notches neceflary 

 in this Spindle. 



Nor have I ufed any more than one Set of Notches in one Mor- 

 tife of any Sort ; but in a wide Mortife, there may be made a 

 double Set of Notches, corTifting of Two Rows, all of equal 

 Bignefs, and half of the Length, and double the Number of a 

 fingle Row, one End of each Notch reaching to the Middle of 

 the Mortife, and pointing againft the End of an Interface, that 

 is between Two of its oppofite Notches. 



Jf ever there fliall be Occafion for this Sort of Notches, it mufl 

 be when a great Proportion of Seed is to be drill'd by a fmall 

 Spindle, and low Wheels : The Smalnefs of the Spindle may 

 not, by a fingle Set, admit of a fufticient Number of Notches (of 

 a proper Bignefs) in its Circurnfeience ; not that a double Set, by- 

 its double Number, will throw down a greater Quantity of Seed 

 than a fingle Set of the fame Width and Depth, but a lefs Quan- 

 tity ; But it may be feared, that a very fmall Number of Notches 

 might not fpread the Seed fo much as to caufe it to lie even in the 

 Chanels, one Notchful falling all to the Ground, before any o£ 

 the next Notchful reaches it, which would make Chafms or Gaps 

 in the Row cf Corn or Legumes: This, fuch a double Number 

 of Notches will certainly prevent. 



It would feem, that the higher the Wheels, the more need there 

 mould be for this double Set of Notches : But it appears to be 

 otherwife ; for the greater Diftance the Seed has to fall, the more 

 it fpreads, and ftrikes oftener againft the Funnel and Trunk; and 

 by that means a Notch from high Wheels will, with the fame 

 Quantity of Seed, fupply a greater Length of the Chanel (or 

 Furrow) than a Notch will from low Wheels. 



In all my Practice I never had any Occafion for fuch a double 

 Set of Notches, either with high or low Wheels, or even when 

 I drilled into open Chanels, without Funnels or Trunks to my 

 Drill-plough ; and yet my Rows of St. Foin, and of Corn, were 

 always free from Gaps, being equally fupply'd with Seed from 

 one End to the other. 



If ever there is Occafion for more than a fingle Set, it mufl be 

 for Beans, for which alfo 1 think a large Spindle is better than a 



Z 3 double 



