For Archimedes (287 -212 BC) were attributed not only the formulation of laws dell'idrostatica and the principle of leverage, but also the invention of tools and machines as mirrors ustori and cochlea or screw to raise the water. Leonardo fed an extraordinary veneration for the scientist who considered the greek most ingenious inventor of antiquity. The lives of Archimedes was to his mind, even for the singular form a spiral, an element macchinale admired. Leonardo, in fact, was continually interested in expanding and diversifying the practical scope in the field dell'idraulica, where coclee, formed by tubes wrapped around to obtain a rotating section for the most part circular for the motion imparted by a rotary crank, favored to transport water from the depth of wells or his raising, without excessive effort by man, from one place down until a great heights for the water supply of urban centres and the drainage of the marshes.
C. 1480. Atlantic Code