466 



INDEX. 



Heliotrope, occurs in the trap of Kinnoul , 

 Helvellyn, height of ...,.« 

 Haematite found in the Cheviot hills .... 

 Hennah, Rev. Richard, Observations on the limestone o 



Plymouth 



Holy Island, clay ironstone formerly collected on, by the 



Carron Company 



Hony, the Rev. W. E. Geological Remarks on the Vicinity of 



Maestricht ........ 



Hornblende rock, found in the Cheviot hills . 



schist, alternates with gneiss at Sleat in Sky 



Huel Peever, Mr. Williams's account of the veins of 



Hastings, height of hills near 



Hypersthene rock, rock of the trap family so called 



Infiltration, process of, by which veins are formed 



Ingleborough, height of 



Iron, ores of; found in Northumberland and Durham 



Iron pyrites, found abundantly in coal and shale; sold to the 



manufacturers of green vitriol .... 



Iron sand, magnetic, found by Dr. Traill in Cheshire 

 Iron, specular, on the primitive crystal and cleavage of 

 Iron work, one only now remaining in Northumberland 

 Iserine, found by Dr. Traill in Cheshire 



Jasper, its resemblance in character to porphyry 



Junction of granite and schist at Cruachan 



of trap and schist at Kinnoul .... 



Killas, traversed by beds of other rocks in Devonshire 



, Dr. Mac Culloch on certain colours in 



, the principal rock from the boiders of Dartmoor along 



the Tavy . . ...... 



, extends to the coast, and joins the Plymouth limestone 



— , of Devonshire intersected by metallic veins 



, altered in its texture by a cross course 



PACE 



227 



436 



95 



410 



67 



310 

 95 

 160 

 139 

 437 

 184 



395 

 435 



85 



19 

 447 

 251 



67 

 447 



134 

 120 



228 



151 



398 



146 

 148 

 148 

 154 



