Page:The geography of Strabo (1854) Volume 1.djvu/196

 182 STRABO. BOOK n. land and sea with which we are acquainted. By this means the form of the habitable earth will appear more clearly to be such as we have described it ; likewise the extent of the va- rious lines, whether traced through its length or breadth, and the latitudes [of places], will also be more clearly distinguish- ed, whether north or south, as also [the longitudes] whether east or west. However, these right lines should be drawn through places that are known. Two have already been thus fixed upon, I mean the two middle [lines] running through its length and breadth, which have been already explained, and by means of these the others may easily be determined. These lines will serve us as marks to distinguish countries situated under the same parallel, and otherwise to determine different positions both in respect to the other portions of the earth, and also of the celestial appearances. 17. The ocean it is which principally divides the earth into various countries, and moulds its form. It creates bays, seas, straits, isthmuses, peninsulas, and capes ; while rivers and mountains serve to the same purpose. It is by these means that continents, nations, and the position of cities are capable of being clearly distinguished, together with those various other details of which a chorographical chart is full. Amongst these latter are the multitude of islands scattered throughout the seas, and along every coast ; each of them distinguished by some good or bad quality, by certain advantages or dis- advantages, due either to nature or to art. The natural advantages [of a place] should always be men- tioned, since they are permanent. Advantages which are ad- ventitious are liable to change, although the majority of those which have continued for any length of time should not be passed over, nor even those which, although but recent, have yet acquired some note and celebrity. For those which con- tinue, come to be regarded by posterity not as works of art, but as the natural advantages of the place ; these therefore it is evident we must notice. True it is, that to many a city we may apply the reflection of Demosthenes 1 on Olynthus 1 Demosthenes, Philipp. III. edit. Reisk. t. i. p. 117, 1. 22. Demos- thenes is here alluding to the cities which different Grecian colonies had founded in the maritime districts of Thrace. The principal of these was the opulent and populous city of Olynthus, which, together with others,