INDEX. 729 



Coal measures, ironstone measures, account of, 1835 probably marked one step in the eleva- 



436. tion of a mountain chain, 628. 



■ num- Concepcion, effects of earthquakes on the build- 



ber of beds and thickness, 437. ings of, with respect to the direction of the 

 rela- streets, 603, 617. 



produce of each bed, 437. Conybeare, Rev. J. J., notice of his subdivisions 



— speci- of the Cornish and Devon slates, 634 note. 



fie gravity of each bed, 438. of his description 



' organic remains of, in Coalbrook of the Tintagel slate, 668. 



Dale, 440. Conglomerates, transition, notices of, in the south 

 . list of minerals in the, of Coal- of Ireland, 7, 13, 14. 



brook Dale, 487. Continents, on the identity of the force which ele- 

 description of, in the Forest of vates, with that which causes volcanic outbursts. 



Dean, 200. 606. 



previous ' remarks on the elevation of, 601 elseq. 



accounts of, 195, 202. Cooper's Island, Bermudas, notice of, 107. 

 divisible Copdock, sections at, 380. 



into two series, 200. Copiapo, notice of the earthquake at, Nov. 1822, 

 contor- ^ lo- 



tions in, 201. Copper, remarks on metallic particles of, in bog 



description of, in county Kerry, 45. wood, 214. 



. contains few Coralline limestone, account of, at Stevensklint, 



beds of coal, 45. 246. 



■ consists chiefly Faxoe,248. 



of sandstone and shale, 49. Corals, list of, in the Devonshire limestone, 



. of Munster poor in iron ore, &Q. 697. 



notices respecting, in the United Corcovado, phaenomena accompaning the out- 



States, 59 et seq. note. bursts of, in 1835, 604. 



Coal, notices of thin laminae of, in South Devon, Cordillera of the Andes, remarks on the structure 



651 note. of» with reference to earthquakes, 623. 



■in Cornwall, 667. phaenomena exhibited by 



Coast, description of the north, of Mayo and Sligo, the volcanos of the, during and after the earth- 



151, quake, Feb. 1825, 603. 



Cockfield, section of well at, 375. volcanos of, may be 



Cole, Viscount, description of his specimen of grouped into systems, 614. 



Plesiosaurusmacrocephalus, 515. remarks on the gradual 



Coleia, a new genus of crustaceans described, elevation of the, 626. 



172. — — theoretical arguments re- 



CoUoony, description of the pass of, in the Ox specting the formation of the, 626. 



mountains, 150. • composed of a succession 



Combe Martin, observations on the coast sections of highly-tilted anticlinal ridges, 627. 



near, 642, 645, 646. rocks forming the axes of 



of the valley of, 646. the ridges, visible only in the valleys, 627. 



Compass, effects of the earthquake of Feb. 1835 probable cause of 



at Chiloe, on the, 602. the phaenomena, 627. 

 Concepcion, earthquake of, on the 20th of Feb. the axes of plutonic rock 



