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metamorphosed material. This has been recognized so far as the pet- 

 rology of igneous rocks is concerned but the petrology of the sedimen- 

 taries, being less inviting, has been largely neglected. It seems prob- 

 able however that the field will eventually yield important results and 

 certainly until it is better understood dicta regarding the metamor- 

 phism of sedimentary rocks must rest largely on assumption. Professor 

 Wheeler's report was not undertaken with this point in view, and yet 

 his results often have considerable bearing on the subject. His work 

 will also, it is believed, prove helpful because of the methods of study 

 and measurement which he has formulated. 



To one not already familiar with the trade, the wide variety of 

 products and the extent of the clay industry in Missouri, will doubt- 

 less come as a surprise, and yet among the most valuable portions of 

 the report are the suggestions with regard to the expansion of the 

 industry. If these be followed the state will soon receive returns 

 many times in excess of the cost of the work. H. Foster Bain. 



The University Geological Survey of Ka?isas. By Erasmus 

 Haworth and Assistants. Vol. II, 318 pp. 25 plates. 

 Topeka, 1897. 



Under the direction of Professor Erasmus Haworth the University 

 Geological Survey of Kansas has published a second volume upon the 

 geology of that state. It is a companion and supplement to volume 

 one, and covers the western half of the state as the former covered the 

 eastern portion. It deals chiefly with the stratigraphy of the Upper 

 Permian, Cretaceous and Tertiary formations, and while it affords much 

 valuable information to the geologist it is written primarily for the 

 citizens of the state. In the preparation of the volume Professor 

 Haworth has enlisted the cooperation of Professor C. S. Prosser of 

 Union College, Schenectady, N. Y., with his two assistants Mr. J. W. 

 Beede and Mr. C. N. Gould, Professor S. Williston of the State Uni- 

 versity, and Mr. W. N. Logan. The report is illustrated with numer- 

 ous half-tone reproductions from photographs, geologic sections and 

 maps. 



The first paper is on the "Physiography of Western Kansas" by E. 

 Haworth. The drainage of the region as a whole is considered and 

 the present drainage is compared with that of Tertiary time. Follow- 



