Page:Arrian's Voyage Round the Euxine Sea Translated.djvu/134

Rh miles. The difference of latitude between Gibraltar and Alexandria is 4° 54′ 10″. Thee, reckoned in the uual way of latitude and departure, amount to 20352029 [sic] Englih miles, equal to 2229 Greek miles, which, divided by 75, give about 29⅔ Greek miles for each day's fail. But I mut ay, that this intance is not fairly adduced. Scylax exprely aigns this time to a hip that ailed round the bays and gulphs that lay in the line of paage, not to one that ailed directly to the point aimed at. This circumtance makes a material difference. Had Mr. Rennel drawn his concluion from an intance he might have found a few lines above, in the ame author, it might perhaps have been different: Scylax there ays, that a hip under favourable circumtances might ail from Carthage to Hercules's Pillars in even days and even nights.

Carthage lies nearly in the ame latitude with Gibraltar, and at leat 15° Eat, which in latitude 36.5 amounts to 56 Englih miles and a mall fraction over to a degree. This multiplied by 15 is equal to 840 Englih miles, or 917 Greek miles; or 131 Greek miles, or 1048 tadia, in twenty-four hours.

The fifth intance he brings is from the Red ea, which, he ays, from Herodotus, is forty days of navigation. Its length, according to the track a hip mut make through it, is about 1300 miles, which makes a rate of aling about 32 miles a day. But I cannot think the navigation of the Red ea proper to be brought as an intance to etimate the ditance which might be failed by the hips of antiquity, or indeed by any hips whatever. Mr. Irwin oberves, that from its narrownes it is oon agitated; that it abounds with