

xxii.] RESULT OF EVOLUTION. 309 



(3.) We shall rarely, if ever, see the darkest lines affected in 

 spots and prominences. 



(4.) The germs of iron are distributed among the various 

 strata according to their heat-resisting properties, the most 

 complex at L, the least complex at A. 



(5.) Whatever process of evolution be imagined, as the tem- 

 perature runs down from A to L, whether A, 2 A, 4A; or 

 A-hB, 2(A+B); or A+B+C; the formed material or final 

 product is the work of the successive associations rendered 

 possible by the gradually lowering temperature of the successive 

 strata, and can therefore only exist at L. 



