J. D. Dana on Currents of the Ocean. 
0 ards: the polar regions. In the ssokhiermel (or isocry- 
he f Expl. Exp. Report on Crustacea, and also in 
nga p. 153, I have given the direction of the 
o£ the ‘surface water of the ocean in winter—or 
month of the year, each line corresponding 
to the mean tem] paige of the coldest month. In this chart, 
the isothermal lines elosely correspond with the above diagram. 
, ean positio rot the fine of 68° i is about half way between 
. ma’ 
In the South Atlantic, “this ‘ie reaches obliquely across, from lati- 
tude 81° S. on the South American coast (the western side of the 
ocean, ae 47° Ww) ae to 7° S. on the African side ee 
b a as hey traverse the central waters, lose the er te 0 
— apt movement is not much evident at the nee 
e 
5 ntinent, 
g since explained by Humboldt. With this difference, the 
elliptical circuit is as apparent in the direction of the isotherma 
me is Bout 10°. The elli tical pee in "the 
eof eer equator, is Poeailise eee by the ae 
: iad 1an i 
stration for each Seas Saint ner the ex 
urrent m0 rulers which give varying : 
n that the hg oer of the 
