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B.  Helland-Hansen. 
[No.  15 
of  a tidal  current.  At  50  meters  we  have  a transition  from  the 
current  with  a constant  direction  at  the  surface  to  the  tidal  cur- 
rents  at  the  bottom,  with  a resultant  current  ultimately  prevailing-; 
and  we  have  an  average  velocity  of  6.2  cm.  per  second  going  N.E. 
In  the  upper  layers,  as  already  stated,  the  tidal  movements  are  so 
little  felt,  that  it  is  difficult  to  say  with  any  certainty  whether  or 
not  tidal  currents  exist  in  them.  If  they  do  exist,  they  must  be 
so  weak  that  the  current  with  the  constant  direction  completely 
overpowers  them.  Figure  12  shows  some  of  the  progressive  vector- 
diagrams  from  this  station ; they  give  a clear  picture  of  the  conrses 
of  the  currents  at  the  different  depths.  Finally  fig.  13  is  a graphic 
representation  of  the  displacement  along  the  average  direction  of 
the  current.  The  average  intensity  of  the  movements  (independently 
of  direction)  was  considerably  greater  at  50  meters  than  is  shown 
by  the  figure,  since  at  this  depth  very  considerable  changes  of  di- 
rection took  place. 
A little  west  of  this  station.  North  of  Hans th olm,  at  a 
depth  of  some  75  meters,  we  found  after  a few  measurements, 
that  there  were  velocities  up  to  29  cm.  per  second  throughout  all  the 
layers  with  a fairly  constant  direction  from  SW  to  NE  (St.  327). 
Ont  off  Ja  ed  er  en  we  took  a number  of  observations  near 
the  land  where  the  depth  was  230  meters  (St.  312).  The  curves  of 
direction  show  the  typical  course  of  a tidal  stream,  but  the  velocity  at  all 
depths  down  to  100  meters  was  always  greatest  with  a norlh-going 
current  and  least  with  a south-going  one.  At  a depth  of  200  meters 
in  the  Atlantic  water  the  reverse  seems  to  be  the  case.  We  might 
almost  conclude  from  these  observations  that  in  the  upper  layers 
down  to  a depth  of  about  100  meters,  there  is  a fairly  strong 
resulting  stream  from  the  South  (SW— SE)  to  North,  aud  that 
there  is  a weak  stream  near  the  bottom  going  in  a contrary  direction. 
