Geology and Mineralogy. 261 



seismographs. The references to seismological literature will be 

 found very helpful to those who wish to follow up the subject. 



H. E. G. 



2. Glaciers of the Canadian Rockies and Selkirks ; by 

 William Hittell Scherzer, Ph.D. Smithsonian Contributions 

 to Knowledge, No. 1692, part of volume xxxiv. Pp. xii + 135, 

 pis. xlii. Washington, D. C, 190V. — As stated in the opening- 

 pages, Dr. Scherzer has brought together in the present memoir 

 the results of an expedition undertaken, under the auspices of 

 the Smithsonian Institution, among the glaciers of the Canadian 

 Rockies and Selkirks in 1904. The author's observations began, 

 however, in 1902, and continued each year until and including 

 1905. 



The general objects of the research were to render available a 

 description of some of the most accessible glaciers upon the 

 American continent, to investigate to what extent the known 

 glacial features of other portions of the world are reproduced in 

 these American representatives, and to ascertain what additional 

 light a study of similar features here might shed upon glacier 

 formation and upon some of the unsettled problems of Pleisto- 

 cene geology. 



The five glaciers selected for study are representative ones, 

 easy of access, among the many which exist in this region. 

 These detailed quantitative investigations serve an immediately 

 valuable purpose in promoting knowledge of this region of mag- 

 nificent mountains and glaciers, but perhaps its greatest value 

 will be as a standard of quantitative comparison for studying 

 future changes in North American glaciation. 



The volume shows the results of thorough study and is finely 

 and profusely illustrated. It is unfortunate, however, that in 

 this, as in certain other Smithsonian reports, there is no general 

 map of the region. This is to be regretted, since most readers 

 who handle the volume will not have such a map at hand, and 

 difficulty will be experienced in holding in mind the geographic 

 relations of the various localities. J. b. 



3. Trait e de Geologie: I. Les Phenomenes geologiques ; par 

 Emile Haug. Pp. 546, photographic pis. 71, figs, and maps 

 195. Paris 1907 (Librairie Armand Colin). — The aim of this 

 volume is to meet the demand for a work on geology which 

 shall be intermediate in character between the elementary manu- 

 als and the works of reference written especially for professional 

 geologists. The work will comprise two parts of equal impor- 

 tance ; the first part, on geological phenomena, forms by itself a 

 rounded treatise. The volume is well illustrated, largely from 

 European localities, and contains at the end of each chapter a list 

 of the more important works dealing with the subject. Such a 

 volume should be of great value to all American geologists, since 

 it gives in an attractive form illustrations of geologic significance 

 from unfamiliar localities and presents prevailing French views 

 of geologic problems. The discussions on continental fragmen- 



