model of STUDY OF A DEVICE FOR COMPOUND LIFTING by Leonardo Da Vinci According to Leonardo's studies, which do not however take into account the notable effect of friction, this Device for Compound Lifting, made up of 10 pulleys, should be able to easily lift 10 pounds of weight with just one pound of based on a drawing by Leonardo da Vinci (1452-1519), Italian artist and polymath. Madrid Codex I, folio 36 v.

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Keywords: -construction, archival, archive, artist, based, codex, compound, da, device, drawing, engineering, historical, history, italian, leonardo, levers, lifting, madrid, model, polymath, pulleys, toothed, vinci, wheel