Sketches of Mechanical Parts and a Pulley
Faint red-chalk mechanical studies with a 10 / 100 note
A faint red-chalk page of five loosely drawn mechanical parts, among them a pulley or block from which weights appear to hang. The only writing is a pair of numerals, 10 and 100, set below the pulley, apparently recording a ratio. A brown stain spreads across the upper right of the leaf.
On this page
Five mechanical parts, including a pulley
The leaf carries five sketchy red-chalk studies of mechanical elements, one of them a pulley or block with lines representing hanging weights. Framing pieces and a wheel-like part accompany it.
A 10-to-100 note at the pulley
Beside the pulley Leonardo has written the numerals 10 and 100. The paired figures appear to record a ratio, perhaps of weight or mechanical advantage at the block.