﻿FISHERY 
  INDUSTRIES. 
  135 
  

  

  to 
  the 
  animal 
  material 
  of 
  the 
  packing 
  house, 
  but 
  nevertheless 
  it 
  offers 
  

   a 
  field 
  in 
  the 
  production 
  of 
  fertihzer 
  and 
  oil, 
  the 
  manufacture 
  of 
  which 
  

   might 
  well 
  be 
  undertaken 
  by 
  the 
  canning 
  interests. 
  The 
  lack 
  of 
  small 
  

   and 
  economical 
  units 
  of 
  machinery 
  has 
  heretofore 
  stood 
  in 
  the 
  way, 
  

   but 
  this 
  situation 
  is 
  being 
  improved. 
  

  

  As 
  bearing 
  upon 
  the 
  manufacture 
  of 
  fertilizer 
  and 
  oil, 
  much 
  interest 
  

   centers 
  in 
  the 
  plant 
  put 
  in 
  at 
  Klawak 
  this 
  season 
  by 
  the 
  North 
  Pacific 
  

   Trading 
  & 
  Packing 
  Co. 
  The 
  plant 
  was 
  located 
  in 
  a 
  building 
  conven- 
  

   ient 
  to 
  the 
  fish 
  house. 
  An 
  endless 
  conveyer 
  took 
  the 
  gurry 
  from 
  the 
  

   iron 
  chink 
  to 
  a 
  hopper 
  or 
  iron 
  tank 
  12 
  by 
  12 
  feet 
  and 
  4 
  feet 
  deep. 
  It 
  was 
  

   then 
  taken 
  by 
  a 
  bucket 
  elevator 
  to 
  the 
  two 
  digestors 
  or 
  cookers, 
  each 
  

   of 
  about 
  5 
  tons 
  capacity. 
  Here 
  the 
  material 
  was 
  cooked 
  in 
  steam 
  for 
  

   an 
  hour. 
  It 
  was 
  then 
  placed 
  in 
  shallow 
  trays 
  wrapped 
  in 
  burlap 
  and 
  

   put 
  in 
  the 
  hydraulic 
  press 
  operating 
  at 
  1,200 
  pounds 
  pressure. 
  About 
  

   1,000 
  pounds 
  of 
  material 
  could 
  thus 
  be 
  handled 
  at 
  a 
  single 
  operation 
  

   of 
  the 
  press. 
  Fifteen 
  minutes 
  served 
  to 
  remove 
  the 
  oil 
  and 
  water, 
  

   wiiich 
  passed 
  to 
  a 
  pit 
  and 
  was 
  then 
  pumped 
  to 
  the 
  settUng 
  tanlcs 
  

   where 
  the 
  oil 
  and 
  water 
  were 
  separated, 
  the 
  oil 
  being 
  drawn 
  off 
  into 
  

   barrels. 
  These 
  tanks 
  are 
  of 
  wood, 
  12 
  feet 
  long, 
  4 
  feet 
  high, 
  and 
  3 
  

   feet 
  wide. 
  

  

  The 
  residue 
  of 
  solids 
  from 
  the 
  press 
  was 
  put 
  in 
  a 
  vertical 
  circular 
  

   drier, 
  with 
  an 
  agitator 
  revolving 
  about 
  25 
  times 
  per 
  minute. 
  It 
  was 
  

   originally 
  intended 
  to 
  put 
  about 
  1,000 
  pounds 
  of 
  material 
  in 
  the 
  

   drier 
  for 
  each 
  charge, 
  but 
  here 
  a 
  difficulty 
  arose, 
  as 
  it 
  was 
  found 
  that 
  

   only 
  about 
  150 
  pounds 
  could 
  be 
  treated 
  successfully 
  at 
  one 
  time. 
  In 
  

   other 
  words, 
  it 
  developed 
  that 
  the 
  capacity 
  of 
  the 
  drier 
  was 
  not 
  pro- 
  

   portionate 
  with 
  other 
  facilities, 
  or 
  with 
  the 
  requisites 
  in 
  treating 
  the 
  

   refuse 
  from 
  a 
  cannery 
  packing 
  1,200 
  cases 
  a 
  day. 
  This 
  was 
  the 
  prin- 
  

   cipal 
  difficulty 
  experienced, 
  and 
  next 
  year 
  it 
  is 
  the 
  intention 
  to 
  double 
  

   the 
  drier 
  capacity. 
  After 
  coming 
  from 
  the 
  drier 
  the 
  fertilizer 
  was 
  

   spread 
  out 
  in 
  the 
  air 
  to 
  aid 
  the 
  drying 
  process. 
  It 
  was 
  then 
  run 
  

   through 
  a 
  sieve 
  and 
  put 
  up 
  in 
  100-pound 
  sacks 
  ready 
  for 
  the 
  market. 
  

   The 
  product 
  commands 
  a 
  price 
  of 
  about 
  S28 
  per 
  ton 
  delivered 
  at 
  San 
  

   Francisco. 
  As 
  a 
  result 
  of 
  the 
  season's 
  experimental 
  operations 
  

   approximately 
  6 
  tons 
  of 
  fertihzer 
  and 
  500 
  gallons 
  of 
  fish 
  od 
  were 
  

   prepared. 
  

  

  Analysis 
  has 
  shown 
  the 
  fertihzer 
  to 
  be 
  rich 
  in 
  ammonia 
  — 
  about 
  12 
  

   per 
  cent 
  — 
  but 
  the 
  sample 
  analyzed 
  contained 
  16 
  per 
  cent 
  of 
  oil, 
  which 
  

   is 
  too 
  much 
  for 
  a 
  strictly 
  high-grade 
  product. 
  It 
  should 
  be 
  reduced 
  

   to 
  10 
  per 
  cent. 
  

  

  An 
  agent 
  of 
  the 
  Bureau 
  of 
  Soils 
  of 
  the 
  Department 
  of 
  Agriculture 
  

   made 
  some 
  preliminary 
  investigations 
  in 
  Alaska 
  during 
  the 
  summer 
  

   to 
  consider 
  the 
  matter 
  of 
  converting 
  cannery 
  waste 
  into 
  fertihzer. 
  

   This 
  was 
  in 
  conjunction 
  with 
  a 
  study 
  of 
  the 
  kelp 
  fields 
  in 
  Alaska 
  

   waters. 
  

  

  