418 INDEX. 



PAGE 



Mineral Beds, Observations on 157 



Mineral Veins, Observations on 158 



Mineral Beds and Veins, on the comparative age of 160 



J\lines of Cornwall, General Observations on the 156 



Estimate of the number of, of the different kinds 



of ore they contain^ and of their relative ages 167 



Mineral Deposits in Cornwall and Devonshire, of the different 



matrices accompanying the 175 



Moniserrat, Dr. Nugent's Account of " The Sulphur" or " Souf- 



friere" in 185 



Muttrell Lode in Cornwall^ Account of the 25 



Nugent, Nicholas, M.D. Account of the Pitch-Lake of the Island 

 of Trinidad 63 



" Account of " The Sulphur" or " Souf- 



friere" of the Island of Montserrat 185 



Old Bed Sandstone Formation in Shropshire 191 



Organic Bcmains found in the Strata over Rock Salt in Hungary 



and Poland 57 



Parkinson James, Esq. Observations on some of the Strata in the 

 neighbourhood of London, and on the fossil remains contained 

 in them 324 



pEPYs, W. H. Esq. Notice respecting the Decomposition of Sul- 

 phate of Iron by animal matter 399 

 Petroleum at Coal-port in Shropshire 195 

 Phillips, Mk. William, Description of the red oxyd of Copper, the 

 production of Cornwall, and of the Varieties in the (orm of its 

 Crystal, with observations on the Lodes which principally pro- 

 duced it, and on the crystallization of the arseniated iron 23 

 Pitch Lake of Trinidad, Dr. Nugent's Account of 63 

 Pitchstone, Vein of, in the vicinity, of Newry 278 

 Plaster, Observations on, by the Count de Bournon o7Q 

 Porcelain Clarj, Vein of, in the Coupee of the Isle of Sercq 15 

 Porcelain Earth, of Cornwall, 125 — in the County of Wicklow, 270 

 Porcelain Jasper in the Island of Trinidad 63, 65 

 Porphyry, on the western side of the Isle of Alderney, 4, 6 — Vein 



of black, in the Isle of Sercq 17 



Porphririiic Granite, of Dartmoor 118 



Porphyritic Bock, in the Island of Montserrat 186 



