Note 603 — Chapter I
W. (William) Falconer translation
Gosselin also observes, that on our charts this distance is about 8100 stadia of 700 to a degree. Consequently the difference between the meridian of Thapsacus and that of Mount Caspius is as much as 4° 45′, in place of the 300 stadia, or from 25′ to 26′ supposed by Hipparchus.