iff a 'Comet-. g&g 
fewx A, winch confitts of Two parts -mclofrrrgfhe tye leg®, THkiis 
figure rallf© Slews- how The .piece C paffes Through 0, mil is ifeeM 
fey The mug ®k: The ferafs work, .contttting'-of <a hollow cylinder,, 
awikedl and pinion,, and index plate, is there represented in i ts 
f%ce. F: Isfkelbody <of the krais work, 'beluga Mhw cyliin- 
alter with a feroad rim (c at the Tipper -end s this rim is partly 
ttumnsd away it© 'make a feed for the wheel d. 'The pinion e 
ttmrm the wheel d, .and carries the index plate a, One <©f its 
pivots imewes- m the arm f, fcrewed upon the upper part' -of 6, 
which arm iferves alio to confine the Wheel d to its place 
tipon <c. The -other pivot is held by the arm g fattened -to -F. 
Fig. 111. Is a plan -of the brafs work. The wheel d, which 
is in the form of a xing, is laid upon the upper part of F or c, 
:and held by two final! ’arms f tnd h y fcrewed down to e with 
the fcrews /, 
Fig. IV. Is a plan of the brafs work. d, d, is the wheel 
placed upon the bed or focket of the rim of the cylinder c, c, 
and is held down by the two pieces f, h, which are fcrewed upon 
c, c. The piece f proje&s over the center of the index plate 
to receive the upper pivot of the pinion n , is the fixed wire 
fattened to c, c. a, p, the -moveable wire fattened to the annu- 
lar wheel d, d. The index plate a is divided into ho- parts, 
each tub-divided into two, and •milled upon the edge. When 
the finger is drawn over the milled' edge of the index plate 
from q towards r, the angle m, r, a, will open, and if drawn 
from r towards q , it will Ihut again. The cafe C, C, mutt, 
have a iharp corner /, which ferves as a hand to poin out the 
ttivifion on the index plate. 
