number in 

 each volume generally appearing in December. 



All exchanges should be addressed to the "Library of the Uni- 

 versity of Colorado, Boulder, Colo." 



Educational institutions, libraries, societies and individuals desir- 

 ing to be placed on the exchange list should make request to the 

 "Secretary of the University of Colorado, Boulder, Colo.," to whom 

 also should be addressed any correspondence in regard to purchase 

 of single copies. 



