No. 1. — List of Dredging Stations occupied hy the United States 

 Coast Survey Steamers " Corwin" "Bibb,'* "Hassler,'' and "Blake,'' 

 from 1867 to 1879. Benjamin Peiece and Carlile P. Pat- 

 terson, Superintendents of the Coast Survey, 



The following stations were occupied by the U. S. Coast Survey 

 Steamer **Corwin," Acting-Master R. Piatt, U. S. N., commanding, in 

 1867, in connection with a survey for a telegraph cable between Key 

 West and Havana. The dredging operations were in charge of L. F. 

 Pourtal^s, Assist. U. S. Coast Survey. The expedition was cut short by 

 the breaking out of yellow-fever on board. 



Locality. 

 5 m. S.S.W. of Sand Key, Fla. 

 1.6 m. from Chorrera, Cuba. 

 2 m. " « 



1.6 m. " « 



The dredgings in 1868 and 1869 were made on board the U. S. Coast 

 Survey steamer "Bibb," Acting-Master R. Platt, U. S. N., commanding, 

 by L. F. Pourtales, Assist. U. S. Coast Survey. They are all comprised 

 in the Florida Straits between Tortugas and Cape Florida. (See U. S- 

 Coast Survey, General Coast Chart No. X., Coast Survey Report for 

 1850.) 



