Large Upright Frame Driven by Twin Screws
A tall timber frame on a tiled floor with paired vertical screws and a threaded top mechanism
This side of the leaf, catalogued as without writings, carries a single large drawing: a tall upright rectangular frame set in perspective on a tiled floor, with two vertical threaded screws rising at its upper corners and joined by a horizontal beam, and a worm-and-screw fitting detailed separately at upper right. It reads as a screw-driven machine for raising or pressing a heavy vertical member. Only faint show-through from adjacent pages is otherwise visible on the sheet.
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Upright frame driven by twin vertical screws
A large rectangular frame stands on a foreshortened tiled floor; two threaded screws rise at its upper corners, linked by a cross-beam, and a detailed screw-and-crank (worm) fitting is drawn separately at the top right. The apparatus appears designed to drive the frame up or down under great force.