332 Of the Drill-Boxes. Chap. XX. 



C, which is perpendicular to its Claws, comes down 

 to the Fiat of the Spindle, and environs one half of 

 the Hole, covering the Part of the Flat which ap- 

 pears of a darker Colour; and then the upper Part of C, 

 in Fig. 15. makes one level Surface with the Flat D 

 of the Spindle ; and then the Iron Fork E, being 

 fcrewed into the Hole F, holds down the Slider fait, 

 fo that it cannot rife up ; and then the Spindle, be- 

 ing in its Place, will run round without moving end- 

 ways, being confined by thefe Wreaths. 



The Spindle being thus placed, fo that it may turn 

 eafily, we place the Seed-box upon its Flanches with 

 its Bottom upwards; and then fetting one (harp Point 

 of a Pair of CompafTes, or fome fuch Inftrument, 

 upon the Spindle, within the Mortife, clofe to the 

 Edge of the Hole or Ellipfe at the End of the tranf- 

 verfe Ax, turn round the Spindle, until the faid Point 

 makes a Mark round the Spindle, which will be a 

 Circle; by the fame means make fuch another Mark 

 at the oppofite Ax; then unfcrew the Fork, and take 

 out the Slider, pull off the Wreath, and take out the 

 Spindle, and cut the Notches between the Two faid 

 Circles and Marks ; the Edges of the Ends of the 

 Notches mufl be Arches of ^ thefe Circles. Thefe 

 Notches mould differ from thofe already defcribed in 

 the Wheat-drill, in nothing but the Smalnefs of their 

 Dimenfions; their Depth mould be about the Thick- 

 nefs of a Turnep-feed, or lbmething deeper. The 

 Breadth of their Bottoms is uncertain, and mufl be 

 greater or lefs according to their greater or lefs Num- 

 ber; but we commonly have Seven or Eight Notches* 

 and make them about the Breadth in which they ap- 

 pear in this Figure; but whatever their Number be, 

 they mud be all equal, and fo mufl all their Inters 

 flices. 



G is the End of a wooden Spindle, thro' which 

 paffes the Iron Crank H. and is fattened to it by its 

 Screw and Nut, at d ; Part of which Crank enters 



the 



