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U. S. DEPARTMENT OF COMMERCE 
CHARLES SAWYER, Secretary 
COAST AND GEODETIC SURVEY 
LEO QTIS COLBERT, Director 
Special Publication No. 215 
Revised (1950) Edition 
MANUAL 
OF CURRENT OBSERVATIONS 
DATA LIBRARY 
REFERENCE COLLECTION 
SkQODS HOLE OCEANOGRAPHIC INSTITU TSG 
UNITED STATES 
GOVERNMENT PRINTING OFFICE 
WASHINGTON : 1950 
For sale by the Superintendent of Documents, U. S. Government Printing Office 
ashington 25, D.C. - Price 55 cents 
