AT DEPTH OF 300 FATHOM S ° 4-4°- 7 
Ocecuxic Girciilatioa. 5. 
EXPLANATION OF COLOURIN 
eooo feet 
r nTitm ipn ahxjwiijg 
Eeiglil of LaixB. 
of Sea 
1000 
1500 
sIlowil tllUS 
Tsoth^rmalfi hef<rw ylvera^e sTiowrt in JBhie thi/s 
