Maps and Charts — By Loans. 63 



By Exchange. 



UNITED STATES GEOLOGICAL SURVEY, Washington, D. C. 



33 Maps and 44 Atlases. 

 NEW JERSEY GEOLOGICAL SURVEY. 



3 Maps. 

 GEOLOGICAL SURVEY OF CANADA. 



1 Map. 



By Purchase. 



UNITED STATES GEOLOGICAL SURVEY, Washington, D. C. 

 679 Sheets. 



Loans. 



NEW YORK ACADEMY OF SCIENCES. 

 33 Atlases. 



