444 



INDEX. 



PAGE 



Trap tuff, in Sky 59 



Trenwliie, found abundantly in the marble of Glen Tilt . 285 

 peculiar granular variety found in Glen Tilf . 288 



of Cornwall. The Rev. W. Gregor on . . 399 



Uranium. Mr, W. Phillips on the Oxyd of, of Cornwall . 112 



Veins of trap, in Sky ....... 75 



two sets of different ages . • . 76 



of clinkstone^ in Sky ...... 78 



frequency of, at Strathaird in Sky •• . . . 79 



Vein, of greenstone, in Glen Tilt ..... 281 



large limestone, in the conglomerate of Somersetshire 357 



of sulphate of barytes, in the limestone of Cannington Park SciS 



Wacke, balls of, contained in a calcareous vein in chalk ' . 173 



. interstratified with chalk in a conformable position- . 17S 



of the North of Ireland, described .... 187 



Wells, in the chalk of the Lincolshire Wolds communicate with 



the sea . . . . . . . . . 393 



Whin dykes, of Fairhead, described ..... 205^ 



Wood Coal, occurs in the North of Ireland . . . . 188 



Zeolites, abundant in the trap, in Sky .... 10 

 resist decomposition for a long time ... 10 



found in great quantities in the Storr, in Sky . 16 



abundant in the amygdaloidal trap, in Sky . 58 — 188 



description of the, in Sky ..... 82 



cubic, found in the North of Ireland . . . 188 



FINIS. 



London : printed by W. Phillip*, 

 George Yard, Lombard Street. 



