OCEAN CURRENTS 



133 



Deep-Sea Current Meters. 



The International investigations into the North and neigh- 



bouring seas hâve led to the introduction of several new and 



interesting experiments in deep-sea research. Amongst the 



apparatus tried is the deep-sea current-meter of Ekman (see 



Messenger-. 



Propelisr- 



SelF Recording 

 Clockworh . 



Frsme'' 



into Compass Box 



^ ' ' Campas. 

 Shot Dropping -^^^^ii^^..«^^ 



Bal/ Besnngs 



FiG. 24. — The Ekmax Deep-Sea Currext Meter. ' 



Fig. 24). The apparatus is attached to a large " sail " or 

 flange, which sets itself in the direction of the current — i.e., 

 in the line of least résistance. A frame working on ball- 

 bearings is attached to a line which can be lowered to any 

 required distance. Inside the frame is a four-bladed propeller 



