I w ] 



the machine within fide; the timber (when of fir) 

 four inches fquare, placed on two wheels B. B. three 

 feet diameter, a little more or lefs, (the old fore- 

 wheels of a chaife may anfwer the purpofe) to fup- 



port the hind part of the machine. 



- ' ' ■ f 1/ .'. . , .^ . ' '...*.. 



* €v*C^^^8r«. 'fiJt 'ftrdn^' pieces of wood, called 

 bulls, three feet long, five inches and a half broad, 

 the thickftefs fix inches at E, No. a, and' tapering 

 to three inches at F. Into thefe bulls are fixed thfc' 

 cutting wheels, which are iron, 13 inches diameter, 

 3-quarters of an' inch thick at the centre, about an 

 inch diameter, for piei'cing holes to fix the iron axles 

 in; from that they are to be o^futh thicknefs, as to 

 allow the edges to be well fteeled. Thefe wheeU are 

 fixed by two boltsr going through the bulls, with 

 eyes on one end, for the axles of the wheels to ruii 

 in, and nuts and fcrews on the other, to make therri 

 very firm by, and funk in the bulls, to prevent thtit 

 interfering with the weights L. refting on them. 



G. G. in No. 1, are hollow pieces of wood, called 

 thorlesy each three inches and a half long, which in- 

 clofe the bolt M. and keep the bulls C. C. at their 

 proper diftances, but may be made longer or fhorter 

 at pleafure, as the ward requires to be cut in larger 

 or fmaller pieces. They are in two pieces, and 

 bound together, and jointed by a (trap of leather or 



cord. 



