EXPLANATORY LIST OF ABBREVIATIONS xxxix 



Kept. Brit. Assoc. Adv. Sci. : Report of the British Association for the Advance- 

 ment of Science. 



Kept. Geol. Surv. Mich. : Report of the Geological Survey of Michigan, Lansing. 



Rept. Mich. Acad. Sci. : Report of the Michigan Academy of Science, Lansing. 



Rept. Nat. Conserv. Com. : Report of the National Conservation Commission, 

 Washington. 



Rept. Smithson. Inst. : Report of the Smithsonian Institution, Washington. 



Sci. Bull. Brooklyn Inst. Arts and Sci. : Science Bulletin of the Brooklyn Insti- 

 tute of Arts and Sciences. 



Scot. Geogr. Mag. : Scottish Geographic Magazine, Edinburgh. 



Smith. Cont. to Knowl. : Smithsonian Contributions to Knowledge, Washington. 



Tech. Quart. : Technology Quarterly of the Massachusetts Institute of Tech- 

 nology, Boston. 



Trans. Am. Inst. Min. Eng. : Transactions of the American Institute of Mining 

 Engineers, New York. 



Trans. Roy. Dublin Soc. : Transactions of the Royal Dublin Society. 



Trans. Seis. Soc. Japan : Transactions of the Seismological Society of Japan, 

 Tokyo. 



Trans. Wis. Acad. Sci. : Transactions of the Wisconsin Academy of Sciences, 

 Arts, and Letters, Madison. 



U. S. Geogr. and Geol. Surv. Rocky Mt. Region : United States Geographical 

 and Geological Survey of the Rocky Mountain Region (Powell), Wash- 

 ington. 



Zeit. d. "Gesell. f . Erdk. z. Berlin : Zeitschrift der Gesellschraft fur Erdkunde 

 zu Berlin. 



Zeit. f . Gletscherk : Zeitschrift f iir Gletscherkunde, Berlin. 



