﻿PART 
  I. 
  

  

  Report 
  of 
  Investigations 
  Made 
  from 
  August 
  21st 
  

   to 
  October 
  l^th, 
  1878. 
  

  

  TANGIER 
  AKD 
  POCCMOKE 
  SOUNDS. 
  

  

  The 
  charts 
  showing 
  the 
  oyster 
  beds 
  and 
  limits 
  of 
  oysters 
  in- 
  

   these 
  Sounds 
  have 
  been 
  constructed 
  from 
  the 
  data 
  collected 
  

   during 
  the 
  progress 
  of 
  the 
  work. 
  

  

  Only 
  the 
  natural 
  beds 
  are 
  shown 
  on 
  them, 
  and 
  no 
  attempt 
  

   was 
  made 
  to 
  carry 
  the 
  investigation 
  beyond 
  the 
  Sounds, 
  ex- 
  

   cept 
  in 
  the 
  cases 
  of 
  the 
  Manokin 
  and 
  Big 
  Annemessex 
  Rivers, 
  

   where 
  the 
  beds 
  were 
  large 
  enough 
  to 
  make 
  their 
  delineation 
  

   and 
  study 
  advisable. 
  

  

  The 
  beds 
  have 
  be^jn 
  named 
  from 
  the 
  solid 
  " 
  rocks 
  " 
  which 
  

   they 
  surround, 
  and 
  are 
  indicated 
  on 
  the 
  charts 
  by 
  the 
  darkest 
  

   shades. 
  In 
  many 
  cases 
  it 
  was 
  a 
  matter 
  of 
  some 
  difficulty 
  to 
  

   determine 
  the 
  outlines 
  of 
  the 
  beds 
  proper, 
  oh 
  account 
  of 
  their 
  

   peculiar 
  formation. 
  

  

  It 
  would 
  have 
  given 
  an 
  erroneous 
  impression 
  to 
  have 
  con- 
  

   sidered 
  either 
  the 
  solid 
  unbroken 
  portions 
  as 
  the 
  beds, 
  or 
  to 
  

   have 
  taken 
  the 
  entire 
  area 
  upon 
  which 
  oysters 
  are 
  found, 
  and 
  

   I 
  have 
  therefore 
  adopted 
  a 
  j^roportion 
  of 
  0.1 
  oysters 
  to 
  the 
  

   square 
  yard 
  as 
  the 
  standard 
  by 
  whicli 
  to 
  determine 
  the 
  

   outlines, 
  all 
  positions 
  where 
  tiie 
  proportion 
  fell 
  below 
  that 
  

   standard 
  being 
  excluded 
  from 
  the 
  beds, 
  unless 
  other 
  circum- 
  

   stances 
  have 
  led 
  me 
  to 
  a 
  dift'erent 
  decision. 
  

  

  The 
  light 
  shades 
  on 
  the 
  charts 
  show 
  the 
  area 
  covered 
  by 
  

   scattered 
  oysters, 
  and 
  as 
  already 
  explained, 
  must 
  be 
  consid- 
  

   ered 
  only 
  approximate. 
  The 
  broken 
  lines 
  show 
  areas 
  where 
  

   the 
  oysters 
  are 
  very 
  widely 
  separated. 
  The 
  dark 
  blue 
  lines 
  

  

  