Water wheel and spiral screw pumps
Sketches of inclined 'chiocciola' screws for raising water and a toothed wheel
The sheet shows two long inclined screws of the spiral 'chiocciola' type together with a toothed wheel turning on a central hub, drawn in light pen. The manuscript catalogue identifies the study as a hydraulic wheel and screw pumps for raising water. A jointed linkage is sketched across the lower part of the page. No transcribed text accompanies the drawings.
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Inclined screws and a toothed wheel
Two long shafts wound as spiral screws are set on an incline beside a toothed wheel mounted on a central axle. The arrangement is a mechanism of screw and gear for driving water upward.
Screws for raising water
The spiral screws are of the kind used to lift water along their inclined length, coupled to a hydraulic wheel as the catalogue notes. The study treats the raising of water as a mechanical problem.