Manchester Memoirs, Vol x/z'v. (icjoo), No. 7. 15 



differences of temperature existed on the same levels and 

 in the same mass, the centres of the granite bosses 

 remaining hotter, and therefore longer fluid, than the sides. 

 In any case the above suggestion removes two for- 

 midable barriers to further inquiries. If it is correct, there 

 is no necessity to limit the temperature of granite forma- 

 tion, as suggested by Mr. Sorby, nor to assume that the 

 earth's interior is solid. 



