vi CONTENTS OF VOLUME VII 



PAGE 



An Attempt to Frame a Working Hypothesis of the Cause of 

 Glacial Periods on an Atmospheric Basis, II. T. C. Chamber- 



lin - - - - - 667 



The Naming of Rocks. C. R. Van Hise - 686 



Editorials 700-701 



Summaries of Current North American Pre-Cambrian Literature. 



C. K. Leith ------ 702 



Reviews : Geology of the Yellowstone National Park, by Arnold Hague, J. P. 

 Iddings, W. H. Weed, C. D. Walcott, G. H. Girty, T. W. Stanton, and 

 F. H. Knowlton (T. C. H.), 709; Report on the Geology and Natural 

 Resources of the Area included by the Nipissing and Temiscaming Map 

 Sheets, comprising Portions of the District of Nipissing, Ontario, and 

 of the County of Pontiac, Quebec, by Alfred Ernest Barlow (F. D. 

 Adams), 713; The Paleozoic Reticulate Sponges constituting the 

 Family Dictyospongidse, by James Hall and John M. Clarke (S. W.), 

 717 Geological Report on Isle Royale, Michigan, by Alfred C. Lane 

 (J. P. I.), 718; The Department of Geology and Natural Resources 

 of Indiana, Twenty-third Annual Report, by George H. Ashley 

 (A. H. Purdue), 720 ; United States Geological Survey, Monograph 

 XXXI, Geology of the Aspen District, Colorado, by Josiah E. Spurr, 

 Samuel Franklin Emmons, geologist in charge (W. T. Lee), 721 ; 

 Geological Survey of Georgia, Preliminary Report on the Artesian 

 Well System of Georgia, by S. W. McCallie (T. C. C), 722 

 Recent Publications ._._..-.... 723 



NUMBER VIII. 



Sir William Dawson. Frank D. Adams 727 



Granite Rocks of Butte, Mont., and Vicinity. Walter Harvey Weed 737 



An Attempt to. Frame a Working Hypothesis of the Cause of 

 Glacial Periods on an Atmospheric Basis, III. T. C. Chamber- 



lin - - - - - - 751 



Editorial ............ 788 



A Reference List of Summaries of Literature on North American 



Pre-Cambrian Geology, 1892 to the Close of 1898. C. K. Leith 751 



Reviews : The Upper Silurian Fauna of the Rio Trombetas, State of 

 Para, Brazil, John M. Clarke. Devonian Mollusca of the State of 

 Para, Brazil, John M. Clarke (J. C. Branner), 813 ; The Cretaceous 

 of the Black Hills as Indicated by the Fossil Plants, Lester F. 

 Ward, with the Collaboration of Walter P. Jenney, William M. Fon- 

 taine, and F. H. Knowlton (W. N. Logan), 814 ; Geology and 

 Physical Geography of Jamaica, R. T. Hill (R. D. S.), 815; Die 

 Stillstandslagen des letzten Inlandeises, etc., K. Keilhack (R. D. S.), 

 824 ; Shore Line Topography, F. P. Gulliver (R. D. S.), 827. 



