A..'. . i.xxx i\ 
AWWMvfl 
>11 
I* runt Sec Uon *he Spnni/. tint/ 
('on ten/ Roller 
Section through one a/' the Pert - Screws , 
irhrrtlv the Inst rumen f ts levelled; and of 
the three Mahogany Planes that are under it. 
pour Sereins at 
malwgon v Plan \ 
Under side of one of the 
taehetl to the octagonal* 
for bringing the Center of the Instrument hy 
,r — the help of its plummet, oner tiny point 
i pj round. 
I 
Various parts of the Instrument represented to large Seales. 
Scale of Inches for parts represented In their 
real dimensions. 
Plan of a part of the 
Circle, with the. ClawgJV/ieels, 
Screw, and Hooks -joint, that 
gwe it a slow motion. 
Milled- head -Key placed at C. /hr 
clamping the Instrument . 
Trout Kiev aboil of one of the Pee f 
Screws, shewing likewise one t >frh, | 
Hlftics of bo.r-wood. and one of the [ 
••on leal Rollers behind it 
Section of the Top if' the vertical sins . 
Plan of one if the Pert of the Instrument 
Settle of flu real dimensions 
