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Geology of Western Ore Deposits by Arthur lakes, Late 

 Professor of Geology in the Colorado School of Mines, Author 

 of "Prospecting for Gold and Silver," etc.— Denver, Colo. 

 The Kendrick BooJc and Stationary Co. 1905. 8° illustr. $2.50. 



The first edition of this work was published many years ago, under 

 the title "Geology of Colorado and Western Ore Deposits," at a time 

 when many of our now leading camps were just discovered and but little 

 known. This edition was quickly exhausted. The present work under a 

 broader title and scope, has been so much remodeled and brought up to 

 date, that it may be considered in the light of a new work, rather than a 

 new edition of the old. 



A marked feature of the book is its copious illustration, most of the 

 sketches being from the author's pencil, and taken in the field. The cuts 

 are chiefly illustrative of some special form of ore deposit or of some geo- 

 logical phenomenon. 



The first part of the book is devoted to a general description of the 

 geology of the ore-bearing regions, and to special geological phenomena 

 bearing on them Typical Colorado and western camps are described, 

 individual mines being mentioned only in so far as they illustrate geolo- 

 gical principles. Colorado has a full share given to it, partly because the 

 writer is most conversant with is own state, and partly because a local 

 description goes far toward a general understanding of the subject. Typ- 

 ical examples of the muring regions of the other western states are given 

 so that the work may justify its title as a comprehensive one of the Geol- 

 ogy of Western Ore Deposits. 



To further assist the reader, a list and description of the principal 

 ores and minerals, together with a glossary, is added. 



The book is of convenient size and neat appearance. It deserves a 

 place in the library of every person who is interested in mining. 



Department of Commerce and Labor. — Keport of the Su- 

 perintendent of the Coast and Geodetic Survey showing the 

 progress of the work from July 1, 1903, to June 30, 1904. — 

 Washington. Government Priting Office. 1904. 4? 774 p. 

 illustr. (O. H. Tittman, Superintendent). 



Contents of appendices : 1. Details of field operations. — 2. Details of 



