Ctlikc, I9W (Ptofic)- 

 Enbu u>d ToTv. It)»-I»43- 



f4o«ra. I857-I8M 



Cauu. H02-H03 



CriKsic. 1909-1915 



ChJfcnfc. 1872-1875 Pigod. 1845 — • • ^— 



Ducovtry. 1902-1904 Gixclle. 1874-1876- • • 



Coast ind Gtodclk Survty. I90J-I9I5 • 



Fig. 11. Tracks of chief vessels on which magnetic observations 

 were made in the Atlantic Ocean, 1839-1916 



54 



