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SCIENCE. A new and improved Map, showing the Geology, Mineralogy, Inland Navigation, Railways, and Principal Roads of England and Wales, and a larr/o portion of Scotland, as far north as Dun- dee and Forfar. On a Scule of Si Miles to an inclt. By J. and C. Walker. We have been favoured with a sight of this beautiful map, so interesting in this locality espe- cially and of which we here give a brief descrip- tion, chiefly taken from the printed prospectus. The geological features are clearly defined by colours; the site of the various mineral produc- tions, as ironstone, copper, tin, lead ore, coal, salt &c. &c., are particularly marked; as well as the channels, sand banks, soundings, and light- bouses. The theory of the tides round (he coast of England and Wales is clearly demonstrated-two geological sections across the kingdom are also given, and the different formations and rocki are made perfectly intelligible, by a copious esplana- tion of their mineral characters and subdivisions, The internal communication of the kingdom, by navigable rivers, canals, railways, forms a promi- nent feature of this map; their elevation above the level of the sea is correctly determined. Pro- jected Railways are likewise distinguished; thus exhibiting at one view the means by which the agricultural, mining, and manufacturing produce are increased in value, from the facilities afforded by these several lines of carriage and intercourse, and showing where similar works may be judi- ciously constructed. In this age of speculation and improvement, a work of this description has become absolutely necessary, and the want of it has often been attended with much inconvenience, The dimensions are sufficient to comprehend every particular of agri- cultural, manufacturing, or commercial utility, and it combines a mass of valuable and important in- formation, not to be found in any work hitherto published, at such a moderate expense, as to render it accessible to all. The compilers have availed themselves of every work that has been published on the subject, among the most prominent of which are the trans- actions of the Geological Societies of London and Cornwall, the Philosophical Societies of Newcastle- upon-Tyne, Worcester, and Cambridge; and the ordnance geological survey has also been used, as far as it has proceeded. Considerable additions have been made in Yorkshire, and in the contiguous counties of Durham, Cumberland, and Lancaster, from the recent work by Mr John Phillips, Pro- fessor of Geolozy at King's College, London and in Norfolk and Suffolk, from the works of Mr Charleswortb, Mr Woodward, and Dr Fitton. From the papers of the last-named gentleman, great im. provements have also been made in the geology of the counties of Cambridge, Northampton, Bedford, Bucks, Berks, and Wilts, and a large portion of North and South Wales, Salop, Hereford, Wor- cester, Stafford, and Gloucester, have been laid down from the splendid surveys by Mr Murchison Valuable assistance has also been rendered by Mr Frederick Burr, who, in addition to many important corrections, has laid down upon the map the metallifertJtis tracts in England and Wales, eluci- dated by explanatory notes. Mr Sopwith, Mr Hutton, and Mr Buddie of Newcastle-upon-Tyne, have contributed numerous improvements in the geology of the Northern counties: the former gentleman has also furnished a section from the St. George's Channel to the German Ocean. The coal fields of Lancashire have been examined and col- lected by Mr Ettas Hall ofCastleton. Scotland has been laid down from the Survey of that country by Dr M'Culloch, but with numerous local corrections by several scientific gentlemen who have lent their aid in improving this portion of the Map. Messrs. Bald and Geddes, Mr Alexander Rose, Mr John Maclaren, and Messrs. Grainger and Miller of Edinburgh, and Professor Thompson and Mr B. Neilson, of Glasgow, have also lent their valuable aid towards the correctness of this important work. And in addition to all these, in order to render this map as complete as possible, proof sheets were sent to almost every part of the kingdom, to be revised on the spot, by gentlemen conversant with the subject. A new and interesting feature has also been introduced into thi,. map, by distinguishing the position and probable extent of those metalliferous tracts, which contain the mineral wealth, and con- sequently form the mining districts of this country. These tracts are shown by a stronger tint than the the general colouring of the map, so as to indicate at a glance the relative situation and extent of those important localities which are known to con- tain metalliferous or mineral productions; and hence fanning, in most oases, the seat3 of mining and manufacturing industry. The direction of the great tidal waves, with the time of high water at new and full moon, is another new and interesting feature in this map, as is also the introduction of an anchor to define the extent to which rivers are navigable. Lines of 10 and 20 fathoms of depp water, and numerous sound- ings round the coast, give value to it as a chart of the shores of Great Britain. Great industry has been employed in collecting the information contained in this map, and much taste has been displayed in arranging that infor- mation in a highly explanatory and useful, as well as ornamental form. A wo'k presenting at a glance stich valuable and various species of information on many subjects of the highest importance, as connected both with scier.ce and with some of the most important in- terests of this country, must carry with it its own recommendation; and we sincerely hope that the spirited exertions of the proprietors may be duly estimated by the public, and rewarded by that ex- tensive sale of the map, which can alone repay them for the labour and expense bestowed on its compilation.

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