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Leonardo da Vinci (Vinci 1452-Amboise 1519)

The aortic valve c.1512-13

Pen and ink on blue paper | 28.3 x 20.4 cm (sheet of paper) | RCIN 919082

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Recto: notes on the valves of the heart & flow of blood within it, with illustrative drawings; a drawing of a mould for the making of a glass model of the pulmonary or aortic valves