170 History of Nature. [BoOK VI. 



we have said) it is Day and Night continually by turns. 

 The same Writers have set down two Circles, before those 

 Points where the others began, and which we set down. 

 The first through the Island Meroe, and Ptolemais upon the 

 Red Sea, built for the Hunting of Elephants ; where the 

 Longest Day is but twelve Hours and an half: the second 

 passing through Syene in Egypt, where the Day hath thir- 

 teen Hours. And the same Authors have put to every 

 one of the other Circles, even to the very last, half an Hour 

 more. 



THUS MUCH OF THE EARTH. 



