Facsimile (Giunti, Florence 1992); ca. 1495-97; 9.5x7 cm
This manuscript is composed of two booklets totaling 159 leaves. The first (1497) presents studies of mechanics, ornamental knots and plaits and of architecture. The second (1495) records Leonardo's research in physics and mechanics (force, gravity, weight and movement).
fols. 90v-91r: Perpetual motion wheel (left); studies on the resistance of arches (right).
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