. L'ingénieur civil et architecte's journal, scientifiques et de la gazette. Architecture ; génie civil ; la science. 1830.] L'INGÉNIEUR CIVIL ET ARCHITECTE'S JOURNAL. 337 La première de nos voyageurs auront vu que ces parties du nord-ouest de notre pays qui sont composés de roches appartenant à la série prima y et de transition ; le second n'ont parcouru ces combustibles des parties de la nouvelle formation de grès rouge, qui sont constituées des débris de roches plus anciennes, et ont sous et près d'eux, des trésors inestimables de charbon minéral, alors que le troisième aura con- une amende sa

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. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1830.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 337 The first of our travellers will have seen only these north-western portions of our country which are composed of rocks belonging to the prima y and transition series; the second will have traversed those fossil portions of the new red sandstone formation, which are made up of the detritus of more ancient rocks, and have beneath and near them, inestimable treasures of mineral coal, while the third will have con- fined his route to wolds of limestone and downs of chalk, which are best adapted for sheep walks and the growth of corn. We will now, with your permission, take the various counties be- ginning with the southern coasts, and proceeding in a northerly direction, will describe the chief formations which present themselves. Beginning with the I^and's End, we have in the cointy of Cornwall the primary formations, the granite and the sienite, with schistose rocks, and similarly ancient formations; in the adjoining county of Devonshire we find rocks of the grcywaeke and transition series; and passing into Wales, and thence to the border comities of Scotland, will meet with rocks of similarly ancient origin ; in Dorsetshire we liave the lias and the oclite, in Hampshire and the Isle of Wight we have the tertiary formations, which also extend into Sussex; at Brighton we meet the chalk which extends to Beachy liead, beyond which the Wealden strata terminates at the coast; the chalk again appear- 'ing on the coast of Kent. At the Isle of Sheppey we meet with the tertiary beds, which foim a part of the London basin. In the county of Sussex we have the remarkable and peculiar Wealden deposits, which have been ascertained by my distinguished friend Dr. Mantell, to be the bed of an ancient and mighty river, which overflowed through the vallies of Kent and Sussex, constituting the drainage of an exten

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