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Bibliography. 451 "7*^ 



ume, " How to Observe Geology,-^' long since out of print, though to a 

 certain extent founded on the former treatise. Its object is to afford a 

 general view of the chief points of geological science, such as existing 

 observations lead us to infer to be firmly established in order to show how 

 Ihe correctness of such observations may be tested ; and to sketch the 

 directions In which they may apparently be extended. The great expe- 

 rience of the^ author as a ''geological observer," the very Nestor of 

 British geologists, his critical and cautious mind, his freedom from the 

 distorting and partial bias oT favorite hypotheses, all render him' pre- 

 eminently the tnan to present a true account of the present achieve- 

 ments of geology, and to indicate the course of study and observation 

 required to advance it. 



10. Elements of Geology^ intended for ihe use of Students; by 

 Samuel St. John, Prof. Chem. and Geoh, in Western Reserve College- 

 New York : 1851. 334 pp. 12mo.— This small work contains a brief 

 review of the principles of the science of Geology illustrated with nu- 

 merous wood-cuts, &:c., well calculated to interest and instruct the stu- 

 dent. Chapter first, treats of the general features and constitution of the 

 earth, and the causes of change, atmospheric, aqueous and igneous : 

 chapter second, of the structure and position of rocks; chapter third 

 of fossils ; fourth, of unstratified rocks; fifth, of stratified primary 

 (metamorphic) rocks; sixth, of the Palccozoic system; seventh, of the 

 secondary system ; eighth, the tertiary period ; ninth, the quarternary 

 period ; tenth, theoretical geology ; eleventh, practical geology ; twelfth, 

 history of geology ; thirteenth, relation of geology to religion ; four- 

 teenth, geographical geology. The subdivisions of the palaeozoic rocks 

 and the local geology of the United States are mentioned under the last 

 head, and sections are introduced illustrating the subject. 



11. The Microscopic Analoiny of the Human Body in Healtli and 

 Disease^ illustrated with numerous drawings in color; by Arthur 

 Hill Hassall, M.B., with additions to the text and plates, and an intro- 

 duction containing instructions in Microscopic Manipulation, by Henry 

 Vanarsdale, M.D. 2 vols, 8vo., 1 vol, text, 560 pp. and one of 79 

 plates. First American edition. 1851. New York : Pratt, Wood- 

 ford & Co. The importance of microscopic research in the study of 

 the human system, is now very generally appreciated by medical men. 

 The work by Mr. Hassall is intended to present some of the results ar- 

 rived at by various recent observers in microscopic anatomy, both by de- 

 scriptions and full illustrations. The first volume containsan account of 

 the structure of the various constituent parts, fluids and solids, of ani- 

 nials, and the second volume gives representations of the same in litho- 

 graphy. The seventy eight plates contain on an average six figures 

 each, and in general are well executed. The last ten plates have been 

 added by the American editor ; they are among the best in the volume. 

 We may add lo the credit of American skill, that the plates of this edi- 

 tion are in general decidedly better than those of the London impression. 

 The work opens with an introduction prepared for this edition, contain- 

 ing much information on microscopes and their accessory instruments 

 for dissection, injection, and other purposes, and on the preparation and 

 preservation of objects. The instruments of the more prominent mak- 

 ers abroad are remarked upon with discrimination, and also the recent 



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