﻿WW 
  

  

  snflficieiit 
  scale 
  to 
  enable 
  lis 
  to 
  transfer 
  many 
  of 
  the 
  

   young 
  fish 
  to 
  the 
  Potomac 
  ; 
  but 
  the 
  numbers 
  deposited 
  

   in 
  that 
  river 
  were 
  increased 
  from 
  year 
  to 
  year, 
  until, 
  as 
  

   will 
  be 
  seen 
  by 
  reference 
  to 
  the 
  table 
  of 
  distribution 
  to 
  

   be 
  found 
  on 
  page 
  43, 
  14,85(),()()() 
  were 
  deposited 
  during 
  

   last 
  season. 
  

  

  As 
  the 
  Susquehanna 
  region 
  had 
  the 
  advantage 
  of 
  at 
  

   least 
  a 
  year 
  in 
  the 
  work 
  of 
  artificial 
  propagation, 
  we 
  find 
  

   that 
  tlie 
  ascent 
  of 
  the 
  curve 
  ax)pears 
  tirst 
  upon 
  the 
  chart 
  

   for 
  that 
  river. 
  In 
  1878 
  the 
  yield 
  of 
  the 
  Potomac 
  had 
  

   reached 
  its 
  lowest 
  figure, 
  166,928. 
  From 
  this 
  point 
  we 
  have 
  

   a 
  marked 
  increase 
  in 
  the 
  yield 
  of 
  both 
  riAers, 
  whereas, 
  

   prior 
  to 
  our 
  efforts 
  to 
  repoj)ulate 
  these 
  streams, 
  there 
  

   was 
  almost 
  always 
  a 
  decrease 
  in 
  the 
  one 
  whenever 
  any 
  

   decided 
  increase 
  was 
  observed 
  in 
  the 
  yield 
  of 
  the 
  other. 
  

  

  The 
  increase 
  of 
  the 
  year 
  188<> 
  was 
  even 
  more 
  marked 
  

   when 
  we 
  take 
  into 
  consideration 
  certain 
  meteorological 
  

   influences 
  and 
  their 
  effects 
  \\\Hm 
  other 
  localities. 
  It 
  hap- 
  

   pened 
  that 
  dui'ing 
  the 
  early 
  run 
  of 
  the 
  shad 
  in 
  Chesa- 
  

   peake 
  Bay 
  southeasterly 
  gales 
  prevailed 
  which 
  must 
  

   have 
  driven 
  tlie 
  fish 
  into 
  Mobjack 
  Bay 
  in 
  large 
  numbers 
  

   while 
  seeking 
  their 
  native 
  Avnters 
  of 
  the 
  Potomac 
  and 
  

   the 
  Susquehanna, 
  since 
  a 
  much 
  larger 
  number 
  were 
  taken 
  

   at 
  the 
  moutli 
  of 
  the 
  York 
  Kiver 
  and 
  in 
  Mobjack 
  Bay 
  

   during 
  last 
  season 
  than 
  had 
  been 
  ca])tured 
  the 
  previous 
  

   year 
  — 
  the 
  catch 
  being 
  increased 
  from 
  171).')74 
  in 
  1871), 
  to 
  

   239,804 
  in 
  b^8(). 
  

  

  INVESTIGATIONS. 
  

  

  The 
  events 
  of 
  the 
  year 
  1880 
  have 
  not 
  only 
  demonstra- 
  

   ted 
  beyond 
  questicm 
  the 
  truth 
  of 
  the 
  theories 
  which 
  have 
  

   been 
  advjiuced. 
  and 
  on 
  which 
  the 
  woi-k 
  of 
  the 
  Maryland 
  

   Commission 
  has 
  been 
  been 
  based 
  ; 
  but 
  they 
  have 
  also 
  

   opened 
  up 
  a 
  new 
  field 
  for 
  the 
  usefulness 
  of 
  this 
  Depart- 
  

   ment: 
  and 
  it 
  is 
  now 
  quite 
  certain 
  that 
  the 
  work 
  of 
  artifi- 
  

   cial 
  propagation 
  can 
  be 
  extended 
  to 
  those 
  fislies 
  whose 
  

   habits 
  have 
  hitherto 
  been 
  little 
  known. 
  

  

  The 
  investigati(ms 
  of 
  the 
  last 
  season 
  indicate 
  that 
  the 
  

  

  