BIBLIOGRAPHICAL NOTICES. 



The Student's Manual of Geoloyy. By J. Beete Jukes, M.A., 

 F.R.S. New Edition. 1862. 



The order of the subjects in this Manual is well adapted to the 

 requirements of the student. Firstly, we have the facts and princi- 

 ples respecting the internal structure of rocks, their mineral compo- 

 sition, texture, and other characters, such as may be recognized by 

 the aid of hand-specimens in the cabinet. This is the Lithological 

 division of the work. Under "Petrology" the author arranges the 

 study of rock-masses, their strata and joints, and the mutual relations 

 of rocks ; this has reference to field-geology. Fossils, their relation 

 to living forms, and the distribution of life in time and space, are 

 next brought forward as Palaeontology. The history of the forma- 

 tion of the crust of the globe, with the chronological classification of 

 rocks and fossils, forms the fourth and last division. 



Each class of subjects above indicated is systematically and care- 

 fully treated, and the requirements of the student are kept well in 

 view. The chemical and mineralogical chapters, however, are not 

 intended to supersede special manuals on mineralogy. The chapters 

 on the formation of rocks, chemical, igneous, and aqueous, contain 

 much instructive matter, carefully arranged and digested from the 

 special works of Cotta, Durocher, Naumann, and others. But the 

 author's genuine geological experience and personal acquaintance 

 with rocks of every kind enable him, in this as in other divisions of 

 the work, to present good and well-arranged material for the student. 

 There are few works (excepting perhaps Prof. Phillips's Manual) 

 that treat so well of stratification and the nature of joints and cleavage 

 as this work ; and in this case also we have the advantage of the 

 author's wide experience in the field. The palseontological portion 

 taken together with the concluding division, that relating to geo- 

 logical classification, is of itself a manual of much value ; and these 

 chapters are the better on account of the diagrams, illustrative of the 

 geological order of the formations, being really sections, and the 

 figures of the fossils being newly and carefully selected by an ex- 

 perienced palaeontologist. Indeed, throughout his work Mr. Jukes 

 has availed himself (with full acknowledgments) of the friendly help 

 of his colleagues in the Geological Survey and the Museum of Irish 

 Industry, with the best results. The ' Manual' is greatly improved 

 in this second edition : the author has been able to work up more 

 closely to his original conception of what geological students now-a- 

 days require, and he has made those corrections which former over- 

 sight and the continual advance of geological observation have made 

 requisite. 



The relations of granite both to metamorphic and to unaltered 

 strata have careful consideration in this Manual, and, when compared 

 with the teaching of older works, have a certain freshness of treat- 

 ment which is pleasant to find, and is redolent of truth as far as 

 observed facts go. Possibly, however, sufficient credit is not given 

 to the views of Naumann and Scrope on the original plasticity of 



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