3.

Posidonius blames Polybius for asserting that the region of the earth, situated under the equator, is the highest, since a spherical body being equal all round, no part can be described as high; and as to mountainous districts, there are none under the equator, it is on the contrary a flat country, about the same level as the sea; as for the rains which swell the Nile, they descend from the mountains of Ethiopia. Although advancing this, he afterwards seems to adopt the other opinion, for he says that he fancies there may be mountains under the equator, around which the clouds assembling from both of the temperate zones, produce violent rains. Here is one manifest contradiction; again, in stating that the land under the equator is mountainous, another contradiction appears. For they say that the ocean is confluent, how then can they place mountains in the midst of it? unless they mean to say that there are islands. However, whether such be the fact does not lie within the province of geography to determine, the inquiry would better be left to him who makes the ocean in particular his study.