APPENDIX. 411 



For the Hole of the Setting-fcrew, lay on upon 

 8ie dark Part of Fig. 8. one of the Paftboard- fides; 

 and from the black Line p 9 q> draw a Line coincident 

 to it as on the Brafs, for making the half Hole A by, 

 and the other Half of it on the oppofite Half fide. 



Thefe Paftboards will be very ufeful to the White- 

 frnith, for directing him to find the Places where the 

 Holes for the Axis of the Tongue, and thofe for 

 fcrewing the Two Halves of the Mortife together, 

 are to be made. I advife againft boring the great 

 Hole with a Tool (a Bit) with more than Four 

 Edges ; for it would be apt to tear the Brafs. 



The great Hole of the Turnep-drill is bored with 

 Tools like thofe wherewith a Gun is bored. But the 

 "Wheat-drill is bored with a Screw-ftock, whofe Edges 

 are madefharp for that Purpofe, and may be fet wider 

 or narrower at Pleafure: It is put into the Hole along 

 with an half-round Piece of Wood, the lower End of 

 the Stock being fet fad: in a Vice : The whole Seed- 

 box (for it mull always be fcrewed together before it 

 is bored), being put on the End of the Stock (made 

 taper a little way for entering), is turned round it by 

 a long wooden Spanner, which hath a Notch in the 

 middle of it, to receive the whole Seed- box, in order 

 to bore it by turning it round upon the Stock. 



The Brafs ought to be of the Deft Sort, which will 

 be eafy to file, and yet not mix with baler Metal. 



The Seed-boxes may be cafl whole by thefe Moulds; 

 but I prefer thole that are icrewed together, for feveral 

 Reafons, which I have not time now to write. 



There is a Turnep Seed-box come to my Hands 

 that was made by Pretenders ; I wifh it is the only one 

 made in the fame manner j for it is ufelefs •, the 

 Notches in the Spindle are much fhorter than the 

 Breadth of the Mortiie; at each End of the Notches 

 is a deep Chanel (as deep as the Bottom of the Notches) 

 quite round the Spindle, infteau of a Mark, which 

 $1011 Id be but juft vifible for cutting the Notches ; 



3 and 



