﻿Astronomical Theory of Ice Ages and Genial Ages. 551 



84°*5. These are practically identical with the result of the 

 larger figure I originally made. 



Showing the shift of the isotherrnals in the epoch of 

 great eccentricity, as calculated by the third method. 



There is one, and, as far as I can see, only one, objection 

 that can be made to the results I have obtained. It might 

 be urged that the winter heat at present received by lat. 54° 

 from ocean currents is much in excess of that received in 

 the epoch of great eccentricity by lat. 50°, and that there- 

 fore lat. 54° at present may be much warmer than lat. 50° 

 was in the earlier epoch. The observations already made on 



