﻿55 
  

  

  port, 
  and 
  also, 
  and 
  chieflj', 
  on 
  account 
  of 
  their 
  small 
  size. 
  

   Fig. 
  5, 
  PI. 
  I. 
  

  

  But 
  much 
  can 
  be 
  done, 
  witli 
  })ain.s 
  and 
  attention, 
  towards 
  

   k<^cping 
  the 
  trays 
  comparativcl}' 
  clear 
  of 
  dead 
  material, 
  and 
  

   the 
  greater 
  the 
  care 
  and 
  attention, 
  the 
  greater 
  the 
  success 
  

   ought 
  to 
  he. 
  

  

  The 
  only 
  remaining 
  point 
  necessary 
  to 
  notice 
  particularly 
  

   is 
  in 
  regard 
  to 
  the 
  dirt 
  and 
  fungus 
  in 
  the 
  jars. 
  Of 
  course, 
  

   in 
  all 
  waters 
  subject 
  to 
  freshets, 
  there 
  will 
  be 
  more 
  or 
  less 
  of 
  

   sediment 
  and 
  floating 
  material, 
  which 
  does 
  not 
  add 
  at 
  all 
  to 
  

   the 
  pui'ity 
  of 
  the 
  water. 
  The 
  only 
  way 
  to 
  prevent 
  this 
  

   material 
  from 
  getting 
  into 
  the 
  jars, 
  and 
  collecting 
  around 
  

   and 
  upon 
  the 
  eggs, 
  thus 
  forming 
  an 
  excellent 
  basis 
  for 
  fun- 
  

   goid 
  growth, 
  is 
  to 
  have 
  the 
  water 
  filtered 
  before 
  it 
  is 
  allowed 
  

   to 
  enter 
  the 
  reservoir 
  Avhich 
  supplies 
  the 
  jars 
  If 
  the 
  

   Commission 
  sliouid 
  conduct 
  operations 
  upon 
  the 
  Earitan 
  

   another 
  yeai, 
  and 
  should 
  use 
  the 
  river 
  water, 
  it 
  would 
  cer- 
  

   tainly 
  have 
  to 
  be 
  filtered, 
  (U* 
  the 
  jars 
  would 
  very 
  caiickly 
  be 
  

   filled 
  with 
  sediment. 
  If 
  the 
  hydrant 
  v»'ater 
  is 
  used, 
  it 
  also 
  

   should 
  be 
  filtered, 
  although, 
  as 
  compared 
  with 
  the 
  river 
  

   water, 
  very 
  free 
  from 
  floating 
  material. 
  As 
  regards 
  fungoid 
  

   growths, 
  they 
  a}>pcar 
  to 
  get 
  into 
  the 
  jars 
  about 
  as 
  easily 
  

   when 
  the 
  water 
  is 
  filtered 
  as 
  wlien 
  it 
  is 
  not, 
  the 
  only, 
  or 
  at 
  

   least 
  the 
  great 
  diflerence 
  being, 
  that 
  in 
  unfiltcrcd 
  water 
  there 
  

   is 
  a 
  vast 
  anntunt 
  of 
  vile 
  material 
  which 
  fosters 
  and 
  encourages 
  

   these 
  fungi. 
  The 
  best 
  method 
  of 
  disposing 
  of 
  them 
  is 
  to 
  give 
  

   the 
  eggs, 
  as 
  soon 
  as 
  any 
  fungus 
  appears 
  upon 
  them, 
  a 
  salt 
  

   water 
  bath. 
  Let 
  the 
  water 
  be 
  shut 
  ofiffrom 
  the 
  jars, 
  a 
  table 
  

   spoonfull 
  or 
  so 
  of 
  salt 
  added 
  to 
  the 
  water 
  in 
  each 
  jar, 
  and 
  

   then 
  allowed 
  to 
  stand 
  for 
  fifteen 
  or 
  twenty 
  minutes, 
  when 
  the 
  

   water 
  should 
  be 
  turned 
  on 
  again. 
  The 
  salt 
  will 
  effectually 
  

   kill 
  all 
  the 
  fungi, 
  without 
  injuring 
  the 
  eggs, 
  and 
  the 
  

   renewed 
  flow^ 
  of 
  water 
  will 
  carry 
  off 
  the 
  salt 
  and 
  the 
  dead 
  

   matter 
  in 
  its 
  flow. 
  As 
  soon 
  as 
  the 
  fungus 
  again 
  collects 
  

   upon 
  the 
  eggs, 
  they 
  should 
  be 
  treated 
  to 
  another 
  salt 
  bath. 
  

  

  If 
  any 
  doubt 
  is 
  felt 
  in 
  regard 
  to 
  any 
  possible 
  injurious 
  

  

  