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  DENSITIES 
  

  

  The 
  density 
  in 
  the 
  water 
  over 
  the 
  different 
  beds 
  is 
  given 
  in 
  

   the 
  Record, 
  Yohmie 
  1. 
  

  

  The 
  least 
  density 
  found, 
  that 
  of 
  1.0113 
  was 
  across 
  the 
  

   mouth 
  of 
  the 
  Pocomoke 
  Iliver 
  at 
  low 
  "water 
  of 
  the 
  spring 
  tide. 
  

  

  The 
  water 
  of 
  the 
  greatest 
  density, 
  that 
  of 
  1.0174 
  was 
  taken 
  

   from 
  about 
  the 
  middle 
  of 
  the 
  Sound, 
  over 
  the 
  Bird, 
  Buoy 
  Spit, 
  

   Muddy 
  Marsh 
  and 
  Hern 
  Island 
  Kocks. 
  

  

  The 
  density 
  over 
  the 
  beds, 
  therefore, 
  would 
  be 
  within 
  those 
  

   limits, 
  the 
  variation 
  amounting 
  to 
  0.0061. 
  The 
  effect 
  of 
  the 
  

   tide 
  does 
  not 
  appear 
  to 
  be 
  invariable, 
  as 
  the 
  greater 
  densities 
  

   were 
  found 
  as 
  frequently 
  on 
  the 
  ebb 
  tide 
  as 
  on 
  the 
  flood. 
  

   The 
  depth 
  of 
  water 
  and 
  the 
  prevailing 
  winds 
  have 
  probably 
  

   a 
  greater 
  effect 
  than 
  anything 
  else, 
  as 
  the 
  density 
  increases 
  

   with 
  the 
  depth, 
  and 
  the 
  prevalence 
  of 
  easterly 
  or 
  south 
  east- 
  

   erly 
  winds 
  backing 
  the 
  waters 
  of 
  the 
  Bay 
  up 
  into 
  the 
  Sound, 
  

   would 
  have 
  a 
  like 
  effect. 
  

  

  As 
  the 
  variation 
  noticeable 
  during 
  the 
  space 
  of 
  eleven 
  days, 
  

   under 
  various 
  conditions 
  of 
  weather, 
  were 
  so 
  small, 
  it 
  can 
  

   hardly 
  be 
  much 
  greater 
  at 
  any 
  time, 
  and 
  unless 
  nmch 
  greater 
  

   shown 
  by 
  the 
  records 
  if 
  representing 
  the 
  change 
  in 
  salinity, 
  

   can 
  have 
  but 
  very 
  little 
  if 
  any 
  effect 
  upon 
  the 
  oysters 
  on 
  the 
  

   beds. 
  By 
  the 
  following 
  tables 
  of 
  comparison 
  it 
  will 
  be 
  seen 
  

   that 
  the 
  fluctuation 
  of 
  density 
  is, 
  as 
  in 
  Tangier 
  Sound, 
  great- 
  

   est 
  at 
  the 
  head 
  of 
  the 
  Sound 
  and 
  least 
  at 
  its 
  entrance, 
  with 
  

   an 
  increased 
  fluctuation 
  where 
  the 
  influence 
  of 
  the 
  Messongo 
  

   and 
  Guilford 
  Creeks 
  are 
  felt. 
  

  

  On 
  the 
  beds 
  above 
  the 
  Bird 
  Rock 
  the 
  difference 
  of 
  density 
  

   noticed 
  was 
  0.0061. 
  On 
  the 
  remainder 
  of 
  the 
  beds 
  the 
  differ- 
  

   ence 
  was 
  0.001.5, 
  showing 
  that 
  there 
  is 
  a 
  much 
  smaller 
  change 
  

   in 
  the 
  density 
  over 
  the 
  southern 
  beds 
  than 
  over 
  the 
  northern. 
  

  

  