INDEX. 



PAGB 



Aberfoi/le, on the Rocks in the Neighbourhood of j. . . 446- 



Adits, in the mining District of Cornwall . . . , 129 



Ailsa Craig, Mineralogical Observations on ... . 417 



Alci/onia, Fossil, on some new Varieties of . . . . 377 



Sti-ata in which they are found . . 384 



of Purbeck, Weymouth and Portland . 385 



Alluvicd Depositions of Tin in Cornwall . . . . 342 



above the Basalt of Staflfa . . . 506 



around London .' . . . . 231 



■ , Fossils found in the . 241 



Alum Bay, in the Isle of Wight, description of . . . 181 



Almnine, Sub-sulphat of, found at Newhaven in Sussex ,, 191 



Amworth, Vitrified Fort of ...... 272 



Amygdaloid of the Isle of Man ...... 45 



— of Burnt-Island, remarkable Vein in the .. .. 440 



Appin, District of. Quartz Rock in the .... 473 



Arisaig, District of, Quartz Rock in the .... 473i 



Arran, Island of. Observations on the Granite of Goatfield in the 426 



Assynt, District of, Mineralogical Observations on the . , 408 



Limestone of the ..... 40S 



Quartz Rock of the .... 458 



Augitc, Rock composed of, with Felspar, in the Island of Rum 402 



BagsJwt Heath, Sand of. . . . . . .. . 224. 



Bakewell, Mr. R. Aa account of the Coalfield at Bradford 



near Manchester . . . . . , . 282 



Basalt of Baasa, Contortions of the . , . . . 439 



— — — of Slaffa, Different varieties of the . . . 502 



Basaltic, Columnar, forms of the Lava of Teneriffe . . 290 



Basin, Hampshire or Isle of Wight, extent of the . . 170 



London, extent of the . ...... . 171 



— Paris, description of the ...... 16L 



Beachey Head, Strata at ....... 192 



Bdl-metal Ore, a Sulphuret of Tin found in Cornwall . . 343. 



3 z 2 



