﻿195 
  

  

  on 
  each 
  section 
  was 
  about 
  the 
  1st 
  of 
  September; 
  that 
  the 
  va- 
  

   riations 
  in 
  Pocomoke 
  Sound 
  were 
  much 
  greater 
  than 
  in 
  Tan- 
  

   gier 
  Sound, 
  and 
  that 
  the 
  maximutn 
  changes 
  were 
  at 
  tlie 
  head 
  

   of 
  each 
  Sound, 
  and 
  the 
  variations 
  diminished 
  towards 
  the 
  en- 
  

   trances. 
  

  

  The 
  third 
  series 
  of 
  curves 
  shows 
  the 
  same 
  when 
  all 
  the 
  ob- 
  

   servations 
  in 
  each 
  Sound 
  are 
  assembled, 
  but 
  with 
  this 
  differ- 
  

   ence, 
  while 
  the 
  density 
  in 
  Tangier 
  Sound 
  was 
  greater 
  on 
  Oc- 
  

   tober 
  1st 
  than 
  at 
  any 
  other 
  time, 
  in 
  Pocomoke 
  Sound 
  the 
  

   influence 
  of 
  the 
  river 
  was 
  still 
  felt, 
  and 
  notwithstanding 
  the 
  

   diminished 
  temperature 
  the 
  density 
  on 
  the 
  1st 
  of 
  October 
  was 
  

   less 
  than 
  on 
  the 
  1st 
  of 
  August. 
  

  

  The 
  fourth 
  series 
  of 
  curves 
  shows 
  the 
  diiference 
  in 
  density 
  

   between 
  the 
  upper 
  and 
  lower 
  sections 
  in 
  Tangier 
  and 
  Poco- 
  

   moke 
  Sounds 
  in 
  each 
  month, 
  and 
  indicates 
  that 
  the 
  density 
  of 
  

   the 
  water 
  is 
  considerably 
  greater 
  over 
  the 
  lower 
  beds 
  than 
  on 
  

   the 
  upper. 
  

  

  The 
  maximum 
  density 
  found 
  during 
  the 
  summer 
  was 
  on 
  

   section 
  3, 
  in 
  October, 
  and 
  was 
  1.01()6. 
  

  

  The 
  minimum 
  density 
  was 
  found 
  in 
  section 
  5, 
  in 
  Septem- 
  

   ber, 
  and 
  was 
  1.0005. 
  

  

  By 
  referring 
  to 
  the 
  curves 
  showing 
  monthly 
  changes 
  of 
  

   Tnean 
  densities, 
  it 
  will 
  be 
  seen 
  that 
  in 
  only 
  one 
  case, 
  that 
  of 
  

   Section 
  5, 
  does 
  the 
  density 
  become 
  less 
  than 
  1.0100, 
  and 
  that 
  

   even 
  on 
  this 
  section 
  it 
  is 
  evident 
  tliat 
  this 
  was 
  not 
  the 
  normal 
  

   condition 
  of 
  the 
  water. 
  

  

  There 
  were 
  heavy 
  freshets 
  in 
  the 
  Pocomoke 
  River 
  during 
  

   the 
  latter 
  part 
  of 
  August 
  and 
  during 
  September, 
  which 
  ac- 
  

   counts 
  for 
  the 
  slight 
  density, 
  as 
  shown 
  by 
  the 
  curves. 
  

  

  Mr. 
  Barroll 
  was 
  informed 
  by 
  tlie 
  inhabitants 
  of 
  the 
  vicinity 
  

   of 
  the 
  mouth 
  of 
  Pocomoke 
  River 
  that 
  these 
  freshets 
  had 
  killed 
  

   large 
  numbers 
  of 
  oysters, 
  both 
  on 
  the 
  natural 
  and 
  planted 
  

   beds. 
  

  

  An 
  inspection 
  of 
  the 
  other 
  curves 
  shows 
  that 
  the 
  variation 
  

   of 
  density 
  on 
  successive 
  tides 
  was 
  not 
  much 
  greater 
  on 
  this 
  

   section 
  than 
  on 
  the 
  others, 
  and 
  as 
  the 
  oysters 
  elsewhere 
  in 
  the 
  

   Sounds 
  did 
  not 
  appear 
  to 
  suffer 
  from 
  the 
  effects 
  of 
  these 
  vari- 
  

   ations, 
  I 
  am 
  of 
  the 
  opinion 
  that 
  the 
  fluctuation 
  was 
  not 
  suffi- 
  

  

  