. Elementary physical geography . Face page <£/* -1 ,,. Warm, Currents ^Hp Cold Currents ffel OCEAN WAVES AND CURRENT8. 183 northern hemisphere this temperature is reached at adepth of about 600 fathoms, and in the southern hemi-sphere at a depth of about 400 fathoms. This indicatesthat under the equator the cold water of the ocean bottomis rising. The System of Ocean Currents. — (Plate 16.) We knowlittle concerning the circulation of the water on the seafloor; but at the surface there are certain very distinctmovements, to which the name ocean currents is given. Inthe A
. Elementary physical geography . Face page <£/* -1 ,,. Warm, Currents ^Hp Cold Currents ffel OCEAN WAVES AND CURRENT8. 183 northern hemisphere this temperature is reached at adepth of about 600 fathoms, and in the southern hemi-sphere at a depth of about 400 fathoms. This indicatesthat under the equator the cold water of the ocean bottomis rising. The System of Ocean Currents. — (Plate 16.) We knowlittle concerning the circulation of the water on the seafloor; but at the surface there are certain very distinctmovements, to which the name ocean currents is given. Inthe Atlantic there is a drift of surface water toward theequatorial portion of South America. This slowly movingsurface water divides against the triangular coast of SouthAmerica, one portion passing southward, the other andlarger part moving northward, still as a slowly movingdrift. A considerable part of the north-moving drift passes intothe North Atlantic outside of the West Indies, and this maybe called the North Atlantic Drift. The portion wh
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