C 719 > 
the BxpUnAticn of the Second Contrhnmr^iy a Circular Motion 
for an Annual devolution 4ni firft in the Outward pms \ 
reprefentedinFigAJ, 
AAAA, The frame of wood, for the Pannelsof Deal to play 
loofe in,at topand bottonn 
BBBB, The Crofles of Deal or Iron faftened to the frame on 
each fide I tp which is annexed the Circular Index divided 
into 1 2 ; in ^^le Center of which the Axletree ^ for the hands is 
placed. 
CC, T^e two Pannels of flic-Deal, 3 foot deep, and 3 foot 
broad^ apiece ^ faftened at each end of the Frame, with adi- 
ftance left in the Middle for the fcope of the Motion. 
the Explanation of the Inward work in FigWh 
AA,The two hand>. 
BB, The two Brafs Pullies or Rollers , the one bigger, the 
other lefs ; to the bigger a flat Leaden-weight is faftened with 
a Cat-gut firing ; to the fmaller is faftened a final! Silver-chain, 
which is by the Noofe or lobp of the brafs Ctobe faftened to 
the Pannel under the middle of thecrofs^near the gap or fcope 
for the Motionjand in that noofe the Chain co have a fafteniog to 
be taken up or let down at pleafure, 
D, The Roller or Pully to be placed on the other Pannei 
oppofice to the Noofe, and near the gap or fcope betwixt the 
two Pannels ; over which Roller the fmall Chain , upon its le 
turn to the Axle-tree, is to be placed. 
E, The Axletree upon which the two Rollers or Pullies Bl^ 
are to be faftened, and the two hands A A for the Index. 
F, The Weight annexed to the biggeft Roller or Pully 
and the firing or Cat-gut to be moved, is ti^have the contrary 
pofture for motion to the fmall Roller or Pully upon which the 
Silver-chain is faftened : fo that, as the Ihrinking of the Pannei 
moves the Axletree one way, the Relaxing may give way to the 
moving the hands or Axletree the other way by the power of 
the Weights drawing 5 which contrary poftures will give the 
niceft account of this Motion. 
sB Note, 
