Force, weight, time and motion in tackle blocks
The mechanics of hauling tackle, a three-pulley diagram, and a note on books to find
A red-chalk note analyses the pulling of tackle blocks under four heads — force, weight, time and motion: the rope of the first sheave moves faster than that of the last in proportion to the number of wheels, and the weight sustained exceeds the weight sustaining by the same ratio. A pen diagram of three linked pulleys illustrates the train. A separate memorandum records that the heirs of Master Giovan Ghiringhello hold works by Pelacano.
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Force, weight, time and motion of a tackle
The pulling of tackle blocks involves force, weight, time and motion. Of motion: the rope of the first sheave runs faster than that of the last in proportion to the number of wheels. Of weight: the load sustained exceeds the load that sustains by the same ratio.
Diagram of three linked pulleys
A pen sketch shows three tackle blocks with their sheaves and ropes, the drawing named in the heading a 'group of pulleys.' It illustrates the mechanical relations set out in the red-chalk note.
Memorandum: works by Pelacano
A jotted reminder records that the heirs of Master Giovan Ghiringhello possess works by Pelacano — one of Leonardo's notes on where to find books. It is unrelated to the mechanical study on the same leaf.