A Contribution to American Thalassography. 
THREE CRUISES 
OF THE 
UNITED STATES COAST AND GEODETIC SURVEY 
STEAMER ' BLAKE" 
IN THE.GULF OF MEXICO, IN THE CARIBBEAN SEA, AND ALONG 
THE ATLANTIC COAST OF THE UNITED STATES, 
FROM 1877 TO 1880. 
BY 
ALEXANDER AGASSIZ. 
IN TWO VOLUMES. 
VOL. I. 
BOSTON AND NEW YORK: 
HOUGHTON, MIFFLIN AND COMPANY. 
The Riverside Press, Cambridge. 
1888. 
