xo Hi. V OF THE EARTH. 



and Other metals, and of minerals like 

 mbine to torn; 



LCt OD the earth are like tl 



m other heavenly bodies. It" the 

 I incandescent, as in the 



lunr . its interior demonstrates m n 



Ways an internal heat, whieh lias played an mi- 



l in its hist < So that, with the mat- 

 ibstantially the same, there 

 l! i< »n for the old definition of ge< 



that department of astronomy which tells the 



. ..t the Earth. 



gical story timers from that told by 



the . mer in givii 



! nature upon the rock inateri- 

 I 'be. They have u < -rked during a time 



h is immeasurably long, when estimated by 

 tli a^> have happened dur- 



human history. This tune cannot b< -sed 



I i work oi 1 1\ i han- 



•lh has 



ited at from 15,000 to 30,000 \< 



r, w lthoiit rea< hing the 



when the newer la] be p ere 



1 his Stup< nation 



: about revolutions in the 

 intinents ; in tin- I 



the < well 



in tl different I lite in 



n in Mi' • hit h would be 



mals w hit h md 



- ie ( hai . about, 1 -nit 



which have desi iur- 



the 



