312 Of the Drill-Boxes. Chap. XX. 



within the Mortife of the Seed-box, and placed al- 

 rnofi, in a manner, diagonally ; for, had it been pla- 

 ced like the other, the Seed getting betwixt it and the 

 Edges of the Mortife, would not have given Way tp 

 its Shutting fas the Air does to the other), but have 

 kt pt it always open ; which would have render'd it 

 ufelefs for fowine; of Seeds. 



The Manner of fattening the Organ-tcngue to its 

 Mortife is by Parchment and Leather glu'd to its 

 Surface, and alfo to the Sound-board, at its End 

 which is oppo&te to that prefTed open by the Key, 

 and fnut by the Spring-, but this our Tongue is held 

 within the Mortife, and moves on an Axis, which 

 paiTes thro' its upper and narrower End, which Axis 

 is the Pin A f which mutt be exactly parallel to the 

 Edge of the End of the Mortife j, and alio thro' the 

 Hole/ in Fig. 3- in Plate 2. which is iecn in its 

 Piace at A in Fig. 3. Plate 3. and like wife through 

 both Sides of the Mortife near their upper Ecges, 

 and as near the Fore-end of the Mortife as may be, 

 without the Tongue's rubbing agajnft the faid Fore- 

 end. 



The Breadth of the Tongue muft be conformed tQ 

 the Breadth and Ejevel of the Mortife, and when it is 

 on its Axis, it being raifed tight up as far as the 

 fhort prick'd Line / m in Fig. 3. Plate 2. being Oner 

 eighth Part of the great Hole, and being there, you 

 fee its upper Edges touch both Sides of the Mortife 

 by their whole Length: Then it is rightly made: and 

 by this touching both Sides of the Mortife tightly and 

 clofely, when raifed pp to that Degree, it appears* 

 that the Two upper Edges of the Sides of the Tongue 

 are inclined to each other in an Angle that is more 

 acute, by about One-third, than is the Angle of In- 

 clination of the Sides of the Mortife. 



Hence, when the Tongue is kt down to its Place, 

 there will be on each Side of it an empty Space, be- 

 twixt it and the Mortife^ of the Form of a very 



acutfe 



