﻿194 
  

  

  Section 
  No. 
  4 
  was 
  across 
  the 
  middle 
  of 
  Pocomoke 
  Sound, 
  

   that 
  the 
  influence 
  of 
  Guilford 
  and 
  Messongo 
  Creeks 
  might 
  be 
  

   known. 
  

  

  Section 
  No. 
  5 
  was 
  above 
  the 
  natural 
  beds 
  of 
  Pocomoke 
  

   Sound 
  and 
  across 
  the 
  mouth 
  of 
  the 
  Pocomoke 
  River. 
  

  

  Stations 
  were 
  selected 
  on 
  these 
  sections 
  in 
  such 
  a 
  manner 
  

   as 
  to 
  obtain 
  specimens 
  of 
  the 
  water 
  that 
  passed 
  over 
  the 
  beds, 
  

   and 
  the 
  specimens 
  were 
  taken 
  by 
  means 
  of 
  the 
  drop 
  water 
  

   cylinders 
  at 
  every 
  two 
  fathoms 
  of 
  depth. 
  

  

  As 
  soon 
  as 
  possible 
  after 
  securing 
  them 
  they 
  were 
  tested 
  

   witli 
  the 
  hydrometer. 
  The 
  results 
  are 
  tabulated 
  in 
  the 
  " 
  Re- 
  

   cord 
  of 
  Densities" 
  and 
  curves 
  showing 
  the 
  various 
  changes 
  

   accompanying 
  this 
  report. 
  

  

  All 
  densities 
  are 
  reduced 
  to 
  a 
  standard 
  temperature 
  of 
  60° 
  

   Fall., 
  and 
  1,000 
  represents 
  the 
  density 
  of 
  distilled 
  water. 
  

  

  In 
  studying 
  these 
  curves, 
  it 
  must 
  be 
  remembered 
  that 
  only 
  

   their 
  variations 
  are 
  of 
  particular 
  importance. 
  The 
  absolute 
  

   density 
  is 
  not 
  so 
  mnch 
  so, 
  except 
  for 
  comparison 
  with 
  that 
  of 
  

   other 
  localities, 
  but 
  the 
  variations 
  in 
  density 
  are 
  important, 
  if 
  

   by 
  them 
  we 
  can 
  account 
  for 
  the 
  failure 
  either 
  of 
  the 
  propaga- 
  

   tion 
  or 
  attachment 
  of 
  the 
  young 
  oysters. 
  

  

  The 
  curves 
  will 
  show 
  certain 
  irregularities 
  due 
  to 
  either 
  the 
  

   variations 
  in 
  depth, 
  or 
  because 
  the 
  tide 
  having 
  changed 
  from 
  

   flood 
  to 
  ebb, 
  or 
  the 
  reverse, 
  on 
  one 
  side 
  of 
  the 
  Sound 
  at 
  a 
  

   time 
  difl*ering 
  from 
  that 
  on 
  the 
  other. 
  

  

  As 
  will 
  be 
  seen, 
  however, 
  the 
  greatest 
  variations 
  in 
  each 
  

   month 
  are 
  in 
  Tangier 
  Sound, 
  on 
  the 
  eastern 
  side, 
  where 
  the 
  

   influence 
  of 
  the 
  rivers 
  is 
  felt 
  to 
  greatest 
  extent. 
  

  

  In 
  Pocomoke 
  Sound 
  the 
  greatest 
  variations 
  appear 
  to 
  be 
  on 
  

   the 
  western 
  side, 
  and 
  I 
  assign 
  as 
  a 
  reason 
  for 
  this 
  that 
  the 
  in- 
  

   fluence 
  of 
  Guilford 
  and 
  Messongo 
  Creeks 
  is 
  of 
  small 
  import- 
  

   ance 
  compared 
  with 
  that 
  of 
  the 
  Pocomoke 
  River, 
  the 
  current 
  

   from 
  which 
  sweeps 
  along 
  the 
  northern 
  and 
  western 
  parts 
  of 
  

   the 
  Sound. 
  

  

  The 
  curves 
  show 
  that 
  the 
  variation 
  is 
  very 
  slight, 
  except 
  on 
  

   the 
  September 
  sections. 
  

  

  The 
  second 
  series 
  of 
  curves, 
  those 
  showing 
  the 
  monthly 
  

   changes 
  of 
  mean 
  densities, 
  indicate 
  that 
  the 
  maximum 
  change 
  

  

  