Chap. XXII. Of the Turntf-DriB. 3S9 



with its upper Edge at this Line. This, with its 

 oppofite Ledger plac'd in the fame manner, will flip* 

 port the Box with the Axis of the Spindle of the S-ed- 

 box, at equal Height with the Centres of the Holes 

 of the Carriage •, fo that if thofe Holes are parallel to, 

 and equidiiiant from the fore Side and hinder Side of 

 the Carriage, and the Axis of the Brafs Spindle be 

 placed in the like manner parallel to, and equidiftant 

 from the fore Side and hinder Side of the Box ; then 

 when the Box is thruil down in its Place, upon thefe 

 Ledgers, and the wooden (falfe) Spindles are placed 

 into their Holes, their Axis will fall into a (trait Line 

 with the Axis of the Brafs Spindle, as they ought. 



Fig. 14. mews the Carriage laid open. A is its 

 back Side lying down. B is its fore Side (landing up. 

 C is the fquare End of the left (falfe) Spindle, whereon 

 a Wheel is to be put up to the Shoulders of the Spin- 

 dle, quite clofe to the Ends of the Carriage. This 

 Spindle, being an Inch and an half Diameter, is held 

 in its Place, and kept from moving end-ways, by Two 

 Wreaths ; the one at a 9 bearing againft thelnfide of 

 the End of the Carriage, the other Wreath at £, bear- 

 ing againft the left Side of the middle Piece ; which 

 Wreath keeps the Spindle from moving towards the 

 right Hand, as the other does from moving towards 

 the left. D is the fquare End of the other wooden 

 Spindle, whereon a Wheel mull be placed in the fame 

 manner as the other Wheel. This Spindle is kept 

 from moving end-ways by Two Wreaths, in the 

 fame manner as the other Spindle is; but this right- 

 hand Spindle, being that which turns the Brafs Spin- 

 dle by its Crank, which enters the Fork, fhould have 

 its Wreaths of Brafs, like thofe defcrib'd in Fig. 17. 

 Plate 4. Part of which Wreaths entering about Three 

 quarters of an Inch into the Hole of the End and 

 middle Part of the Carriage, being firmly fcrew'd on 

 to the Spindle, prevent the Friction that would other- 

 wife be betwixt the Wood of the Spindle, and the 



C c 3 Wood 



