Simple screws and how much water each raises
The water-raising screw compared by pipe-thickness, on a sheet crowded with mechanisms
A densely worked sheet of mechanical sketches — a coiled spring, geared wheels, a rosette-like wheel and assorted rods and linkages — carries a short note comparing simple screws (chiocciole), the helical water-raising kind. Screws equal in pipe-thickness and length move more easily when slenderer, while among screws equal in length and thickness the one with the wider pipe carries less water in proportion, and altogether the screw with the thicker pipe raises less water to a given height. Most of the sheet's drawings and further notes are not included in the transcription.
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Which simple screw raises water most easily and most
Among simple screws equal in pipe-thickness and length, the slenderer moves more easily. Among screws equal in length and thickness, the one with the wider pipe carries less water in proportion, and the screw with the thicker pipe raises less water to one and the same height.
A sheet crowded with mechanisms
Across the leaf are many mechanical studies — a coiled spring, toothed wheels, a rosette-shaped wheel and assorted rods and linkages. None of these drawings is carried in the transcription, which gives only the note on the water-screw; further untranscribed jottings surround them.