1.

In his Second Book Eratosthenes endeavours to correct some errors in geography, and offers his own views on the subject, any mistakes in which we shall endeavour in our turn to set right. He is correct in saying that the inductions of mathematics and natural philosophy should be employed, and that if the earth is spheroidal like the universe, it is inhabited in all parts; together with some other things of this nature. Later writers do not agree with him as to the size of the earth,442 nor admit his measurement. However Hipparchus, when noting the celestial appearances for each particular locality, adopts his admeasurements, saying that those taken for the meridian of Meroe,443 Alexandria, and the Dnieper, differ but very slightly from the truth. Eratosthenes then enters into a long discussion concerning the figure of the globe, proving that the form of the earth together with the water is spheroidal, as also the heavens. This however we imagine was foreign to his purpose, and should have been disposed of in the compass of a few words.