Article by Franz M. Feldhaus describing Leonardo da Vinci's designs, from about 1500, for a mechanically driven cloth shearing machine. It opens with a short biography of Leonardo and the fate of his manuscripts, then goes through six drawings from the Codex Atlanticus. These show four shearing tables driven by a swinging shaft, tension rolls, gearing, spring and springless shear mechanisms, and Leonardo's own notes. It ends by noting that Everett of Wiltshire invented a similar machine in 1758.