VI PREFACE. 



notes on their method of formation, and references to the 

 chief localities where they may be studied. Details are 

 also given of the Eruptive and Metamorphic rocks, of 

 Metalliferous deposits. Springs and Mineral Waters, together 

 with some remarks on the origin of the Scenery. The 

 object, in short, is to enumerate the principal geological 

 facts of this country ; and consequently the work differs 

 from ordinary Text-Books of Geology, whose main purport 

 is to impart a knowledge of the Elements and Principles 

 of the Science as a whole. In the present edition Mr. 

 Rutley has kindly revised his notes on the mineral cha- 

 racters of the Eruptive and Metamorphic rocks ; while Mr. 

 E. T. Newton has contributed a new Synopsis of the 

 Animal Kingdom. 



Owing to the additions thus made, it has been found 

 necessary to omit a particular account of the geology of 

 the principal lines of Railway, but many of the sections 

 exposed along these routes have been noted in the text ; 

 moreover, the Glossary that was appended to the former 

 edition is no longer inserted, as the various terms are now 

 explained in the body of the work. 



Differences of opinion still exist on the Nomenclature 

 and Classification of certain strata, and as the International 

 Geological Commission has not yet formulated any definite 

 scheme, the classification in the previous edition has been 

 retained, except in a few cases where a change was needed. 

 As before, alternative groupings are stated, and, wherever 

 possible, old and well-established names of formations 

 are employed, while the synonyms are also mentioned. 

 Numerous tables are given with the view of explaining 

 more clearly the relations of the various divisions of the 

 Stratified rocks. 



