Page:Arrian's Voyage Round the Euxine Sea Translated.djvu/187

 APPENDIX.

THE learned Bihop of St. Aaph, Dr. Horfley, in a note annexed to Dr. Vincent's Account of the Voyage of Nearchus, has expreed himelf to be of a different opinion, repecting the length of the tadium, from the one above pecified. I hall take the liberty of examining briefly his Lordhip's arguments; and mut requeit the reader's patience, if I repeat ome part of what has been urged in the foregoing Diertation.

He begins with oberving, that the circumference of the earth amounted, according to Eratothenes's calculation, to 252,000 tadia; and, according to Aritotle, to 400,000 tadia; and infers from thence that the Radium of Aritotle was to the tadium of Eratothenes as 252 is to 400, or very nearly as five to eight.

But this propoition takes it for granted that Ariiotle and Eratothenes agreed in opinion repecting the dimenions of the earth, and differed only in repect to their etimations of the meaure which each of them repectively employed; a poition which can by no means be admitted. It