396 THE DEPTHS OF THE SEA. (CHAP. VIII, 
passes through any particular region, must be re- 
garded, as I have already said, as depending almost 
entirely upon latitude. Taking this into account, 
the surface temperatures in what we were in the 
habit of calling the ‘ warm area’ coincided precisely 
with Petermann’s curves indicating the northward 
path of the Gulfstream. 
I extract the foilowing from a letter dated 23rd 
September, 1872, from Professor H. Mohn, director of 
the Norwegian Meteorological Institute at Christiania, 
to Mr. Buchan, the excellent secretary of the Scottish | 
Meteorological Society :—‘‘I have this summer got 
some deep-sea temperatures which may be of general 
interest for our climate. In the Throndhjems-fjord 
I found 16°5 C. on the surface, and from 50 fathoms 
to the bottom (200 fathoms) a very uniform tempera- 
ture of 6°5 C. in one place, and 6° C. in another 
place further in. In the Sceguefjord I found 16° C. 
on the surface, and 6°5 C. constantly from 10 to 
700 fathoms. Between Iceland and Féroe, Lieu- 
tenant Miiller, commander of the Bergen and Iceland 
steamer, has found this summer 8 C. at the bottom 
in 3800 fathoms. This proves that the Gulf-stream 
water fills the whole of the channel, contrary to 
what is the case in the Froe-Shetland channel, 
where there is ice-cold water in a depth of 300 
fathoms.” The facts here mentioned are very 
important, and entirely confirm our results ; but my 
chief object in giving the quotation is to show the 
unhesitating way in which the explanation which 
attributes the high temperature of the sea on the 
Scandinavian coast to the Gulf-stream is adopted b 
those best qualified to form an opinion. 
