Comparisons PP III 68/69/70
The example below includes the first image of the vortex in the Principles (at PP III 68/69/70) in the following editions: 1644, 1647, 1650, 1656E, 1656J, 1657,1659, 1664, 1668, 1672, 1677. This image of the Cartesian vortex is published 11 times in the 1644 and the 1650 editions, 10 times in 1656J, 9 times appears in 1656E, 1657, 1664 1672, 1677, 7 times in 1659 and 1668, and only once in 1647.
