Page:Transactions of the Geological Society, 1st series, vol. 1.djvu/430

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Mineral Beds, Observations on 157
Mineral Veins, Observations on 1 58
Mineral Beds and Veins, on the comparative age of 160
Mines 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 176
Montserrat, Dr. Nugent's Account of ” The Sulphur" or “ Soufrière” in 185
Muttral Lode in Cornwall, Account of the 26
Nugent, Nicolas, Account of the Pitch-Lake of the Island of Trinidad 63
─────── Account of ” The Sulphur" or “ Soufrière” of the Island of Montserrat 186
Old Red Sandstone Formation in Shropshire 191
Organic Remains 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 Sulphate of Iron by animal matter 399.
Petroleum at Coal-port in Shropshire 195
Philipps, Mr. William, Description of the red oxyd of Copper, the production of Cornwall, and of the Varieties in the form of its Crystal, with observations on the Lodes which principally produced it, and on the crystallization oi 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 376
Porcelain Clay, Vein of, in the Coupée 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, 66
Porphyry, on the western side of the Isle of Alderney, 4, 6—Vein of black, in the Isle of Sercq 17
Porphyritic Granite, of Dartmoor, 118
Porphyritic Rock, in the Island of Montserrat 186