The laſt inſtance I ſhall produce from Arrian ſhews a nearer coincidence. From Ceraſus to Trapezus is, according to Arrian, 745 ſtadia. It meaſures on D'Anville's map 660; and, with the addition of ⅛, = 85 ſtadia, makes up 745, agreeing exactly with Arrian. Arrowſmith's chart agrees nearly herewith. It meaſures by that 649 ſtadia; and, with the addition of ⅛, equal to 81 ſtadia, makes up 730 ſtadia; not differing ſo much as two Greek miles from the calculation of Arrian.
There is in the 28th volume of the Mémoires de Littérature, page 362, a paper written by Mr. De la Nauze, on this ſubject. He is of opinion that Herodotus, Xenophon, Ariſitotle, and other writers of antiquity, employed a Radium of ten to a mile. He begins his proof of this with ſaying, that Herodotus aſcribes fifty fathoms, or ὀργυιαὶ, to the depth of the lake Moeris in Egypt, which is rendered by Pliny fifty paces; and as the former of theſe meaſures was to the latter in the proportion of 6 to 5, he inferred that the ſtadia of Herodotus were ten to a mile. But firſt, the proportion of 6 to 5 is not correctly the ſame with that of ten to eight. 0: 5:: 10: 8.333. Again, there is reaſon to think that the paſſus, when applied to explain the ὀργυιὰ., means ſix feet, and refers to the expanſion of the arms, not of the legs. Pitiſcus's Lexicon derives it "a paſſis vel expanſis brachiis, et dicitur Græcis ὀργυιὰ, quæ eſt menſura ſex pedum, quæ inter ambas manus, menſurato ſimul pectore, continetur expanſas."
Another inſtance adduced by Mr. La Nauze is taken from the ſuppoſed diſtance between Epheſus and Sardis. But this has been ſo differently computed by geographers, modern as well as ancient, that it is difficult to draw any concluſion.
