MEAN TEMPERATURE OF THE OCE 
HVLS '’Challenger 
- t 
Ajitarctii C<rcl« 
Vrr- 
X 
‘ y 
I SOTHERMAL LINES 
SHOWIN(; THK MKAN TKMPKHATITRE (TAJI«) 
OK THE OCEAN AT 
DEPTH OF 1000 FATHOMS 
t*o iro 
70 00 
»htfwn m. fhttA 
Trade of BLM S. Ch 
Gha]] \ 
