Winch machine with lettered lead counterweight
Mechanism drawn with points a d b c and a lead weight; the lower guard sheet is nearly blank
Two sheets are mounted together. The upper one shows a substantial machine built around a large drum or wheel on a horizontal shaft with pulleys and a ratchet-like stop, its parts marked a, d, b and c, with a lead weight noted at one end. A further note asks the reader to consider five hundred of some element set together and compare their widths on the window side against the opposite side. The lower guard sheet, recorded as devoid of writing, carries only faint mechanical sketches.
On this page
Machine lettered a d b c with a lead weight
The drawing is keyed with the letters a, d, b and c, and a lead mass is marked as part of the assembly. The instruction states that the span a b is turned as tight as c d, describing how two portions of the mechanism are drawn up to the same tension. The catalogue links the sheet with a winch-stop and catapult motifs.
Note comparing five hundred set together
A lower-left note asks the reader to consider five hundred of some repeated element placed all together, and how much wider they stand on the window side than on the opposite side. The observation is terse and its object is not spelled out in the transcription.