190 



THE STORY OF THE EARTH. 



cal, v, 10, 13. 



:. EJO. 



1 rul\ D 



9t ^5. 90. 

 , : 14. 



u. 



Unconformity of strata, 57, 74. 

 . 50. 



V. 



• ft* 



Volcanic ash, 26, 30, ^5. 



Volcanic rocks, 26. 

 Volcanoes, 14; extinct, 16. 



\Y. 

 Water, agency of, in volcanic 



action, 10, 26. 

 W'cnlock UmC8t01 

 Whitehurst, John, 6i 



Wind as a geological agency, 31. 



Xylobius, 113. 



X. 



Zcuglodoti, 174. 



.Hi' 



THE END 



