Geology and Mineralogy, 303 



ever since then the action of the great Alpine and Subalpine 

 rivers has been, as it still is in our own day, mainly directed to 

 regaining the old valley-floors by removing those enormous accu- 

 mulations of glacial and glacio-fluviatile material which are 

 respectively the direct and indirect products of three successive 

 and general glaciations. — Q. J. G. Soc, lii. 



2. U. iS. Geological Survey. — The completed volumes of Parts 

 II, III and IV of the Sixteenth Annual Report have been issued, 

 and notice has already appeared in our pages of the director's 

 official report and several separate papers of Part I already pub- 

 lished.* 



Part II contains papers of an economic character. Among 

 them are the report on the " Geology and mining industries of 

 the Cripple Creek district, Colorado," by Whitman Cross and 

 R. A. F. Penrose Jr. (pp. 1-210), and Mr. F. N. Ne well's report 

 on "The Public Lands and their water supply" (pp. 457-588). 



Parts III and IV contain the annual report (for 1894) on the 

 Mineral Resources of the United States, which has heretofore 

 been published as a separate report, now appearing as two large 

 volumes. Part III on metallic products and IV on non-metallic 

 products. These volumes were prepared, as the earlier ones of 

 the same series, by David T. Day, geologist in charge, with the 

 assistance of specialists. 



3. Bibliography and Index of North American Geology^ 

 Paleontology, Petrology, and Mineralogy for 1892 and 189S ; 

 by F. B. Weeks. Bulletin No. 130, ij. S. Geological Survey. 

 — This Bulletin is a continuation of the annual publication here- 

 tofore known as the '* Record of North American Geology" 

 (Bulletins Nos. 44, '75, 91, 99). The extended scope of the work 

 necessitated a change in its arrangement. It is divided into two 

 parts ; a bibliography and a subject index. The bibliography is 

 arranged alphabetically by author's names. The index comprises 

 geographic, geologic, mineralogic, paleontologic, and petrologic 

 subdivisions, arranged alphabetically ; and lists of economic 

 products, minerals, rocks, and fossils described in the various 

 papers listed in the bibliography are given. A similar bibliog- 

 raphy and index for the year 1894, and another for the year 

 1895 (Bulletins Nos. 135 and 146, respectively) are in press and 

 will be delivered soon. 



4. Iowa Geological Survey.— The Annual Report for 1895, 

 with accompanying papers by State Geologist Samuel Calvin and 

 Assistant H. Foster Bain, has appeared with the usual amount of 

 new contributions in the elaboration of the geology of this state. 

 The special reports in this volume cover the counties of Jones, 

 Washington, Boone, Woodbury, Warren and Appanoose. 



5. Elements of Geology, a text-hook for colleges and the general 

 reader, by Joseph LeConte, 4:th edition, revised and enlarged, 

 with neio plates and illustrations, pp. 670. (D. Appleton & Co.) 

 1896. — This excellent text-book of geology, improved by the 

 revision, the addition of new matter and many new figures, 



* This Journal, vol. cli, pp. 142-146. 



