INDEX. ,437 



PACK 



Greenstone slate, occurs in the Mourne mountains in the North 



of Ir. land ........ 142 



Gregok, The Rev. W. On the Tremolite of Cornwall . . 399 



Grei/stone, occurs in the North of Ireland . . . . 186 



Grejj-jcacke, and Greywacke date, in the North of Ireland, des- 

 cribed !46 



of Somersetshire, described, by Mr. Horner . 345 



Ci/psum, contained in large quantities in the red sandstone near 



Watchet 375 



Hailstone, The Rev. J. Woodwardian Professor, &c. on the 



Geology of Cambridgeshire ..... 243 



Hornblende, crystallized in Sky ' . . . . . 59 



, found in the granite of the Mourne 



mountains . . . . . . . 135 



with Mica occurs in the North of Ireland . 143 



slaie, in the North of Ireland, described . . J 40 



rock, in the North of Ireland, described . . 140 



HoRNEK, Leonard, Esq. F.R.S. Sketch of the Geology of the 



South-Western part of Somersetshire .... 338 

 Hi/persthene, found in Sky . . . « . 66 — 92 



in Aberdeenshire . . . . . . 93 



Ichthyophthalmite, found at Dunvegan in Sky ... 90 



Induration, of Mineral substances after taking them from their 



beds . . . . ...... 286 



Ireland, Geological Sections of the Coasts of Antrim and Derry, 



described ........ 196 



The Rev. W. Conybeare on the Geological Features of 



the North Eastern Counties of . . . . 121 



■ Dr. Berger on the Geological Features of the North 



Eastern Counties of ...... 121 



and Scotland, similarity in the Structure of part of 123 — 124 



125—131 

 Junction, remarkable one at Glen Tilt . . . . 274 



