184 



V. WALFRID EKMAN. 







.fi tn 



Direction 



Displace- 





Pressure 



Velocity 



Hour 



m 



Oh 1^ 



of 

 Current 



ment of 

 Pendulum 



fc 



of 

 Current 



in ^°^- 

 sec. 



2"34- a.m. 



1 



50 



EbyS 



11 



1-94 



>21-4 



>13-0 



•38 



0-5 



1-7 



EbyS 



1-4 





2-1 



4-0 



•42 



— 



— 



EbyN 



3^8 



0^94 



36 



4-6 







0^5 



(the current had apparently become weaker). | 



•44 



— 



— 



NNE 



11 



0-94 



>10^4 



>8^5 



•46 



— 



6 



WSW 



1^5 







1-4 



2-8 



•48 



— 



11 



SE 



1^5 







1-4 



2-8 



•51 



— 



16 



NNW 



11 







>10-4 



>8^5 



From 11 '25 a. m. to 12*8 p. m., observations were taken in 

 increasing depths down to 11 m. (PI. XXI, fig. 35), but at the 

 last-named hour some change must have taken place in the cur- 

 rents, and I have therefore put together the succeeding obser- 

 vations for the time up to 2 p. m. on a new dial, fig. 36. 



A strong NE surface-current flows here down to a depth 

 of 2 m., and its influence is perceptible even at a depth of 3 or 

 4 m. Beneath it flow rather weak, variable currents at depths 

 between 5 and 25 metres, and finally, below that, there is a 

 strong NE., deep current (more than 12 cm. per sec.) between 

 30 and 40 m. At a depth of 60 or 61 m. (1 or 2 metres from 

 the bottom), there are again weaker, irregular currents (fig. 38). 

 At 2 p.m. an eddy seems to have passed at a depth of from 

 30 to 40 metres, and to have disturbed the currents, as may be seen 

 from fig. 37, containing the observations taken between 25 and 

 251 p. m., with depths given. 



In the afternoon, when it was calm, the observations were 

 repeated at St. V. Unfortunately no thorough investigation was 

 then made. It seems, however (fig. 39), as if the deep currents 

 were on the whole unchanged, only possibly somewhat weaker ; 

 but the surface-current had now decreased to almost nothing. It is 

 this example that leads me to believe that the above-mentioned 

 changes in the current on April 13th are changes with time, 



