DEPARTMENT OF MINES 



geological survey 

 Canada 



Ottawa, ........190.. 



It is requested that publications 

 received from this Department be 

 acknowledged by returning the attached 

 form, duly signed and dated. 



Failure to acknowledge the receipt 

 of publications will be looked upon 

 as an indication that they are not 

 desired. 



Exchanges, for the library of the 

 Department are respectfully solicited, 



The Librarian, 



Geological Survey, 

 Ottawa, 



Canada . 



