﻿110 
  

  

  Tlie 
  difference 
  of 
  density 
  over 
  the 
  beds 
  south 
  of 
  Little 
  

   Island 
  and 
  north 
  of 
  Little 
  Annemessex 
  River 
  is 
  0.0031. 
  

  

  The 
  difference 
  of 
  the 
  beds 
  south 
  of 
  Jane's 
  Island 
  Light 
  is 
  

   0.0020. 
  

  

  These 
  differences 
  show 
  that 
  the 
  greatest 
  fluctuation 
  is 
  over 
  

   the 
  beds 
  in 
  the 
  middle 
  of 
  the 
  Sound 
  and 
  is 
  probably 
  due 
  to 
  

   the 
  influence 
  of 
  the 
  Big 
  Annemessex 
  and 
  Manokin 
  Rivers 
  

   and 
  the 
  waters 
  entering 
  by 
  Kedge's 
  Straits. 
  

  

  Throughout 
  the 
  Sound 
  there 
  is 
  a 
  marked 
  difference 
  between 
  

   the 
  densities 
  of 
  the 
  water 
  taken 
  about 
  the 
  latter 
  part 
  of 
  Au- 
  

   gust 
  and 
  the 
  first 
  part 
  of 
  September 
  and 
  those 
  taken 
  in 
  Oc- 
  

   tober. 
  

  

  This 
  difference 
  is 
  given 
  in 
  the 
  following 
  table 
  : 
  

  

  Bed. 
  

  

  I 
  Q 
  

  

  Ang. 
  Oct. 
  

   Fishing 
  Bay 
  24 
  | 
  5 
  

  

  24 
  5 
  

  

  26 
  5 
  

  

  26 
  ! 
  4 
  

  

  27 
  

  

  Were 
  Point 
  

  

  Nanticoke 
  Middle 
  Gr"d. 
  

   Bed 
  N. 
  of 
  Turtle 
  Egg 
  Is. 
  

  

  Chain 
  Shual 
  

  

  Piney 
  Island 
  Bar 
  

  

  Bed. 
  

  

  0018 
  I 
  Manoliin 
  Bed. 
  

  

  0014 
  

   0014 
  

   0016 
  

   0011 
  

   0010 
  

  

  

  Harrie' 
  Rocl£ 
  

  

  I 
  

  

  Great 
  Rocl£ 
  

  

  I 
  

  

  1 
  Woman's 
  Marsh 
  

  

  Great 
  Thoroughfare... 
  

  

  California 
  

  

  Johnson's 
  Rock 
  

  

  Aug. 
  

  

  27 
  

  

  29 
  

  

  30 
  

  

  30 
  

  

  Sept. 
  

  

  5 
  

  

  Sept. 
  

   30 
  

   Oct. 
  

  

  I 
  1 
  

   I 
  Sept. 
  

  

  ! 
  28 
  

  

  23 
  

   28 
  

   26 
  

   20 
  

  

  

  .0017 
  

   .0005 
  

   .0007 
  

   .0008 
  

   .0007 
  

   .0009 
  

   .0010 
  

  

  It 
  will 
  be 
  seen 
  by 
  the 
  table 
  that 
  the 
  observations 
  were 
  made 
  

   at 
  from 
  two 
  weeks 
  to 
  six 
  weeks 
  apart 
  ; 
  that 
  generally 
  speak- 
  

   ing, 
  the 
  amount 
  of 
  difference 
  in 
  the 
  densities 
  increases 
  with 
  

   the 
  interval 
  between 
  the 
  observations 
  and 
  that 
  the 
  northern 
  

   beds 
  and 
  those 
  in 
  the 
  rivers 
  are 
  exposed 
  to 
  greater 
  fluctuations 
  

   of 
  density 
  than 
  the 
  neighboring 
  ones 
  in 
  the 
  Sound. 
  

  

  If 
  the 
  change 
  of 
  density 
  over 
  the 
  beds 
  as 
  shown 
  by 
  these 
  

   tables, 
  represents 
  with 
  approximate 
  accuracy 
  the 
  change 
  of 
  

   salinity 
  of 
  the 
  water, 
  the 
  fluctuation 
  is 
  too 
  slight 
  to 
  seriously 
  

   affect 
  the 
  beds 
  or 
  oysters 
  but 
  if 
  the 
  slightness 
  of 
  the 
  change 
  

   is 
  due 
  to 
  organic 
  matter 
  held 
  in 
  solution 
  by 
  the 
  waters 
  of 
  the 
  

   ebb-tide, 
  which 
  would 
  replace 
  the 
  salt 
  of 
  the 
  flood, 
  there 
  may 
  

  

  