464 INDEX- 



PAGE 



Fire-damp, account of 54 



Flints in Chalk, Mr. Buckland's Observations on the history of 413 



, Theory of their formation on organic remains 420 



, formed in a different manner from the geodes 



in trap rocks ........ 422 



Flints, plated, veins of, in chalk . . . . . 417 



Flinty slate, appearance of in the clay slates of Cruachan when 



in contact with veins . . . . . , , ] 13 



occurs on the Western shore of Sky . . . ijq 



Fossil, remarkable one found at Whorlbury camp . . 217 



Fossils, of the plastic clay formation 279, 285, 286, 292, 296 300 



■ , of the Plymouth limestone, observed by Mr. Hennah 410 



Fossil Fish, found in the magnesian limestone near Sunderland 9 

 Fossil Shells, found in the slate of Tintagel .... 424 

 of Snowdon . . . 425 



Galena, found in strings in Whitley quarry near Cullercoats . 5 



■ , the only metallic ore found in the magnesian limestone 



of Northumberland and Durham ..... 9 

 , found in nodules of clay ironstone in the shale of the 



coal measures ........ 19 



, filling a crevice by the side of a basaltic vein . . 24 



, found near Bristol ...... 200 — 203 



Git.by, W. H. M.D. On the magnesian limestone and red marl 



or Sandstone of the neighbourhood of Bristol . . 210 



GlenGloy, traces of parallel roads in ..... 334 



Glen Roy, Dr. Mac Culloch on the parallel roads of . . 314 



, detailed description of the parallel roads of . 317 



, their breadth . . . . . . . 322 



. , their elevation above the sea and neighbouring lochs 327 



, causes which produced them, were equal and similar 328 



, connexions of with the adjoining glens . . . 332 



■ ■ , form and structure of the parallel roads of . . 337 



, its connexions with the sea ..... 338 



, statement and examination of the hypothesis that the 



parallel roads of, are works of art, as roads for hunting 343 

 , statement of the three hypotheses which attribute the 



formation of the parallel roads to the action of water 349 



