1474. See No. 1421, 1. 3, 6 and Vol. I, No. 343.
1475. Compare No. 1504.
1476. Where Leonardo found the statement that Cato had found and restored the tomb of Archi- medes, I do not know. It is a merit that Cicero claims as his own (Tusc. V, 23) and certainly with a full right to it. None of Archimedes' biographers -not even the diligent Mazzucchelli, mentions any version in which Cato is named. It is evidently a
slip of the memory on Leonardo's part. Besides, according to the passage in Cicero, the grave was not found 'nelle mine ffun tempio'-which is highly improbable as relating to a Greek-but in an open spot (H. MULLER-STROBING).—See too, as to Archi- medes, No. 1417.
Leonardo says somewhere in MS. C.A.: Archi-
tronito e una macchina di fino rame, invenzlon d* Archi- mede (see 'Saggiol, p. 20). I.2 82b]
1477.
Aristotle, Book 3 of the Physics, and Albertus Magnus, and Thomas Aquinas and the others on the rebound of bodies, in the 7th on Physics, on heaven and earth.
M. 62a]
1478.