U.S. TREASURY DEPARTMENT - - - COAST GUARD 



BULLETIN No. 20 



INTERNATIONAL ICE OBSERVATION 

 AND ICE PATROL SERVICE IN THE 

 NORTH ATLANTIC OCEAN - [l-'g S'o ] 



MARfNE 

 BIOLOGICAL 

 UBORATO?rr 



LIBRARY I 



WOODS HOtE,MA;s>. 

 W. H. 1. 



