Amone the Contents of Forthcoming 

 Numbers of 



WILL BE THE FOLLOWING 



Modification of the Great Lakes by Earth Movement, 



By prof. G. K. gilbert, 



U. S. G^<)LOGiCAL Survey; 



Down the Volga, from Nijni Novgorod to Kazan, 



By prof. FREDERIC W. TAYLOR, 



■AND 



The principal geographical papers to be 

 presented at the Toronto Meeting of the British 

 Association for the Advancement of Science. 



JUDD & DETWEITvER, PRINTERS, WASHINGTON, D. C 



