﻿44 
  

  

  and 
  freedom 
  from 
  mud 
  seemed 
  to 
  favor 
  the 
  fixation 
  of 
  

   the 
  fry. 
  The 
  slates 
  which 
  occupied 
  a 
  vertical 
  j^osition 
  

   did 
  not 
  as 
  a 
  whole 
  yield 
  results 
  as 
  satisfactory 
  as 
  those 
  

   which 
  were 
  placed 
  Hatwise. 
  

  

  The 
  tiles 
  were 
  not 
  received 
  in 
  time 
  to 
  make 
  a 
  thorough 
  

   trial, 
  but 
  they 
  seem 
  to 
  be 
  well 
  adapted 
  to 
  retain 
  their 
  

   coating 
  of 
  mortar, 
  so 
  far 
  as 
  I 
  have 
  been 
  able 
  to 
  judge 
  

   from 
  a 
  dozen 
  put 
  into 
  the 
  water 
  in 
  the 
  early 
  part 
  of 
  

   October. 
  

  

  Shingles 
  will 
  not 
  be 
  adapted 
  to 
  the 
  work, 
  unless 
  they 
  

   can 
  be 
  protected 
  in 
  some 
  way 
  from 
  the 
  i-avages 
  of 
  the 
  

   ship-worm, 
  as 
  they 
  will 
  not 
  last 
  more 
  tlum 
  one 
  season 
  at 
  

   the 
  utmost, 
  even 
  though 
  they 
  were 
  coated 
  with 
  mortar> 
  

   The 
  difficulty 
  in 
  fastening 
  the 
  shingles 
  together 
  is 
  much 
  

   greater 
  than 
  in 
  arranging 
  the 
  slates, 
  wlii(di 
  also 
  have 
  the 
  

   merit 
  of 
  being 
  indestructible 
  if 
  properly 
  cared 
  for. 
  

  

  Chaplets 
  of 
  oyster 
  shells 
  were 
  also 
  tried 
  ; 
  the 
  shells 
  

   were 
  taken, 
  a 
  hole 
  punched 
  through 
  the 
  centre 
  and 
  

   strung 
  upon 
  galvanized 
  wire. 
  This 
  form 
  must 
  be 
  sup- 
  

   ported 
  u]:)on 
  a 
  fnimework 
  or 
  suspended 
  to 
  stakes, 
  as 
  the 
  

   strings 
  of 
  shells 
  are 
  heavy 
  and 
  very 
  quickly 
  sink 
  to 
  the 
  

   bottom. 
  They 
  have 
  the 
  merit 
  of 
  being 
  cheaply 
  made 
  

   since 
  the 
  only 
  thing 
  it 
  is 
  necessary 
  to 
  buy 
  is 
  the 
  wire, 
  

   which 
  costs 
  but 
  a 
  trifle. 
  I 
  am 
  told 
  by 
  Maj. 
  Ferguson 
  

   that 
  this 
  type 
  of 
  collector 
  is 
  very 
  effective 
  as 
  used 
  in 
  

   practice 
  by 
  the 
  French. 
  Other 
  shells 
  will 
  answer 
  the 
  

   same 
  purpose, 
  such 
  as 
  those 
  of 
  the 
  white 
  clam, 
  etc.— 
  

   Another 
  form 
  which 
  was 
  suggested 
  by 
  my 
  assistant, 
  Mr, 
  

   W. 
  P. 
  Sauerhoff, 
  has 
  the 
  advantage 
  of 
  being 
  bouyant. 
  

   This 
  type 
  was 
  made 
  of 
  pine 
  cones, 
  of 
  which 
  we 
  could 
  

   obtain 
  an 
  abundance 
  near 
  the 
  pond. 
  They 
  were 
  strung 
  

   (m 
  wire 
  in 
  the 
  form 
  of 
  chaplets, 
  six 
  or 
  eight 
  of 
  which 
  

   were 
  fastened 
  at 
  one 
  end 
  to 
  a 
  stake 
  and 
  wei.iihted 
  down 
  

   at 
  the 
  other, 
  and 
  an-anged 
  so 
  as 
  to 
  radiate 
  like 
  the 
  

   spokes 
  of 
  a 
  wheel 
  from 
  the 
  stake. 
  The 
  c(mes 
  however 
  

   tend 
  to 
  accumulate 
  mud 
  which 
  lodges 
  between 
  the 
  scales; 
  

   their 
  etfectiveness 
  Avas 
  not 
  detei-mined, 
  since 
  they 
  were 
  

  

  