Page:Arrian's Voyage Round the Euxine Sea Translated.djvu/181

180 calculation. The ditance from the Rhebas to Acra Melaenæ is counted by Arrian 150 tadia; but it meaures by the large map 18½ Englih miles nearly. If to thee we add ⅛ for winding, we hall have upwards of 20½ miles, equal to about 170 tadia, or nearly a fifth part more than Arrian's computation. But, on the other hand, from Heraclea to Amatris is, according to Arrian, 690 tadia; but by Arrowmith's chart it meaures, in a traight line, 542 tadia; to which if we add ⅛, it comes nearly to 609 tadia, or 81 hort of Arrian's computation.

Again, from Amatris to Carambis is, according to Arrian, no more than 480 tadia; but by Arrowmith's chart it meaures, in a direct line, 550, and with the addition of ⅛, 619 tadia. It is obvious that no jut concluion repecting the length of the tadium can be drawn from the two lat intances.

From Sinope to Amius is, according to Arrian, 1020 tadia; but by Arrowmith's chart it is, in a right line, 786 tadia only; and 884, with the addition of ⅛. The difference in the ditance between Amius and Cera untum is till greater. Arrian makes it 1570 tadia; Arrowmith's chart no more than 925, in a direct line; and, with the addition of ⅛, only 1041.

Faden's map however makes it to be 1226 tadia, or 1379, with the addition of ⅛. D'Anville makes it 1110 tadia in a direct line, or 1248.7 with the addition of ⅛. Modern geographers in this intance vary nearly as much from one another, as modern do from ancient. The