880 REVIEWS AND ABSTRACTS 



residuary origin. Extensive areas of alluvial and sedimentary soils are 

 found only in the southwestern corner. 



Sixteenth Annual Report, U. S. Geol. Survey, Charles D. Walcott, 

 Director. Washington, 1896. 

 The report is issued in four volumes of which the first embraces 

 the administrative reports and all papers of a theoretic nature. Among 

 the latter are : '"The Dinosaurs of North America," by O. C. Marsh ;. 

 " Glacier Bay and its Glaciers," by H. F. Reid ; "Some Analogies in 

 the Lower Cretaceous of Europe and America," by L. F. Ward ; 

 "Structural Details in the Green Mountain Region in Eastern New 

 York," by T. N. Dale; "Principles of North American Pre-Cambrian 

 Geology," by C. R. Van Hise; "Summary of the Primary Triangula- 

 tion Executed Between 1882 and 1894," by Henry Gannett. In part 

 second, made up of papers of an economic character, are, among 

 others, "Reports upon Cripple Creek," by Cross and Penrose, "A 

 Reconnoissance across Idaho," by G. H. Eldridge, "A Report upon 

 the Mercur Mining District," by J. E. Spurr, and a paper upon "The 

 Public Lands and their Water Supply," by F. H. Newell. Parts three 

 and four contain the matter formerly published separately in the series 

 of volumes known as Mineral Resources. 



Additional reviews and abstracts crowded out of this number will appear in 

 the following issue. 



