FIGURE IV.

A technical woodcut illustration depicts a mechanical apparatus for pumping or lifting. A large vertical cogwheel (A) meshes with a smaller lantern gear (B, I). A horizontal axle features a drum (C) with projecting cams (D, E) that interact with a vertical rod (M), which terminates at a base (G) set into a heavy block (H). A second vertical rod (L) hangs with a heavy tapered weight (F).