AT DEPTH OF 800 FATHOMS = 37 : 3 
Oceanic Cixculatian.. Map TO, 
EXPLANATION OF COLOURING 
6000 Feet 
Contone e showing 
Height of LanH. 
Contours showing 
Depth of Sea 
1000 
[el r skown thus 
Is other nulls below -Average shown* in Blue thus 
