1503

Quotations and notes on books and authors.

of double the diameter cannot be moved by double the exertion, be- cause the superficies of a body of the same form but twice as large has four times the extent of the superficies of the smaller, as is shown in the two figures a and n.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

Notebooks of Leonoardo da Vinci
XXII: Miscellaneous Notes.
. . .
1483,
1484,
1485,
1486,
1487,
1488,
1489,
1490,
1491,
1492,
1493,
1494,
1495,
1496,
1497,
1498,
1499,
1500,
1501,
1502,
1503,
1504,
1505,
1506,
1507,
1508
Inventories and accounts.
1509,
1510,
1511,
1512,
1513,
1514,
1515,
1516,
1517,
1518,
1519,
1520,
1521,
1522,
1523
. . .