On painting: knowing anatomy to render nudes
The painter must know nerves, bones and muscles; with a citadel sketch and a ground plan
The main text is a passage 'On painting' arguing that a painter, to render the limbs, attitudes and gestures of nudes well, must know the anatomy of nerves, bones, muscles and tendons, making only the muscles active in a given movement prominent. Leonardo mocks draughtsmen whose nudes look like a sack of nuts or a bundle of radishes rather than muscular human surface. The block also notes a cartographic (citadel) sketch continued from f. 78v, and a small ground plan is drawn at the left.
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On painting: anatomy in the service of the nude
It is necessary for the painter, to be a good composer of limbs in the attitudes and gestures of nudes, to know anatomy. Only the muscles responsible for a given movement should be made prominent and thickened, not all of them everywhere.
Nudes without grace: a sack of nuts or a bundle of radishes
Leonardo criticises those who, to appear great draughtsmen, make their nudes wooden and graceless, so that they look like a sack of nuts rather than a human surface, or a bundle of radishes rather than muscular nudes.
Knowledge of nerves, bones, muscles and tendons
The passage requires the painter to know the anatomy of the nerves, bones, muscles and tendons, so as to identify which nerve or muscle causes a given movement or exertion.
Citadel sketch continued from f. 78v
The block records a cartographic sketch, labelled 'citadel', that continues from the facing folio 78v. A small ground plan with circular fittings is drawn at the left of the leaf.
