( o 
Diameter, having Notches, or Teeth, to take hold of 
the Leaves of a Pinion of caft Iron Q_, io Inches Di- 
ameter, with eight Teeth in it moving on an Axis. The 
other loofe End of this Chain has a large Weight hang- 
ing at it, to help to counterpoife the Wheel, and preferve 
the Chain from Aiding on the Pinion. On the fame 
Axis is fixed a Cog-Wheel R, 6 Feet Diameter, with 
48 Cogs. To this is applied a Trundle, or Pinion, S, 
of fix Rounds, or Teeth ; and upon the fame Axis is 
fixed T, a Cog-Wheel of 51 Cogs, into which the 
Trundle V, of fix Rounds, works ; on whofe Axis is a 
Winch, or Windlafs, W, by which one Man, with the 
two Windlaffes, raifes or lets down the Wheel as there 
is Occafion. 
And becaufe the Fulcra of thefe Levers, M N, are in 
the Axis of the Trundle K, viz. at M or X, in what 
Situation foever the Wheel is raifed or let down, the 
Cog- Wheel 1 1, is always equidiftant from M, and works, 
or geers truly. 
By Means of this Machine the Strength of an ordi- 
nary Man will raife about fifty Ton Weight. 
I, I, is a Cog-Wheel fixed near the End of the great 
Axis, 8 Feet Diameter, and 44 Cogs working into a 
Trundle K, of 4^ Foot Diameter, and 20 Rounds, whofe 
Axis or Spindle is of Caft Iron 4 Inches in Diameter, 
lying in Brafies at each End, as at X. 
Z Z is a quadruple Crank of Gaft Iron, the Metal be- 
ing 6 Inches fquare, each of the Necks being turned one 
Foot from the Center, which is fixed inBrafles at each 
End in two Head-ftocks faftned down by Caps. One 
End of this Crank at Y is placed clofe abutting to the 
End of the Axle-tree X, where they are at thofe Ends 
