﻿1082 
  EEPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [108] 
  

  

  "3. 
  In 
  the 
  process 
  of 
  extracting 
  oil 
  from 
  fish, 
  the 
  subjection 
  of 
  the 
  latter 
  

   to 
  the 
  water- 
  absorbing 
  action 
  of 
  plaster-of-paris 
  or 
  equivalent 
  absorb- 
  

   ents, 
  substantially 
  as 
  specified." 
  

  

  No. 
  259140. 
  

  

  (Frank 
  L. 
  Harris, 
  Harrisonburg, 
  Va. 
  ; 
  patented 
  June 
  G, 
  1882; 
  manufacture 
  of 
  fer- 
  

   tilizing 
  material. 
  See 
  Plate 
  CXXXVII.) 
  

  

  Bone, 
  horn, 
  or 
  hoof 
  is 
  subjected 
  to 
  pressure 
  while 
  immersed 
  in 
  water 
  

   heated 
  above 
  the 
  boiling 
  point 
  for 
  the 
  required 
  length 
  of 
  time, 
  which 
  

   will 
  be 
  until 
  the 
  water 
  reaches 
  the 
  temperature 
  of 
  about 
  250° 
  or 
  300° 
  

   Fahrenheit. 
  The 
  pressure 
  is 
  produced 
  by 
  heating 
  the 
  water 
  in 
  which 
  

   the 
  bones 
  are 
  immersed 
  in 
  an 
  air-tight 
  vessel. 
  The 
  bone 
  thus 
  treated 
  

   is 
  then 
  removed 
  and 
  allowed 
  to 
  dry. 
  The 
  water 
  remains 
  in 
  the 
  vessel, 
  

   and 
  a 
  fresh 
  charge 
  of 
  bono 
  is 
  introduced 
  into 
  the 
  same, 
  and 
  the 
  opera- 
  

   tion 
  is 
  repeated. 
  After 
  a 
  succession 
  of 
  operations 
  the 
  water 
  is 
  drawn 
  

   off, 
  and 
  the 
  dried 
  bone 
  is 
  allowed 
  to 
  soak 
  in 
  the 
  water 
  thus 
  enriched 
  

   with 
  gelatine 
  until 
  the 
  bone 
  has 
  absorbed 
  most 
  of 
  it. 
  The 
  bone 
  is 
  then 
  

   again 
  dried, 
  and 
  finally 
  is 
  pulverized 
  for 
  market. 
  

  

  The 
  drawing 
  shows 
  a 
  furnace 
  and 
  a 
  closed 
  vessel 
  surrounded 
  by 
  a 
  

   jacket, 
  and 
  placed 
  upon 
  the 
  furnace. 
  The 
  closed 
  vessel 
  has 
  a 
  steam- 
  

   tight 
  cap, 
  and 
  the 
  flame 
  and 
  heat 
  from 
  the 
  furnace 
  enter 
  the 
  space 
  be- 
  

   tween 
  the 
  jacket 
  and 
  the 
  closed 
  vessel 
  rapidly 
  to 
  heat 
  the 
  latter. 
  An 
  

   ordinary 
  gage 
  indicates 
  the 
  pressure 
  and 
  a 
  chain 
  that 
  can 
  be 
  connected 
  

   with 
  a 
  crane 
  serves 
  to 
  lift 
  the 
  apparatus 
  from 
  the 
  furnace 
  when 
  desired. 
  

  

  CLAIMS. 
  

  

  " 
  The 
  herein-described 
  process 
  of 
  producing 
  a 
  fertilizer, 
  consisting 
  in 
  

   immersing 
  bones, 
  horns, 
  or 
  hoofs 
  in 
  water 
  within 
  an 
  air-tight 
  vessel, 
  and 
  

   while 
  so 
  immersed 
  and 
  confined 
  subjecting 
  the 
  article 
  to 
  pressure 
  by 
  

   heating 
  the 
  water 
  above 
  the 
  boiling 
  point, 
  removing 
  and 
  drying 
  the 
  

   charge, 
  and 
  introducing 
  into 
  the 
  same 
  water 
  a 
  fresh 
  charge, 
  and 
  treat- 
  

   ing 
  it 
  in 
  a 
  similar 
  manner, 
  next 
  allowing 
  a 
  quantity 
  of 
  the 
  article 
  thus 
  

   treated 
  and 
  dried 
  to 
  soak 
  in 
  the 
  water, 
  so 
  as 
  to 
  absorb 
  the 
  gelatine 
  con- 
  

   tained 
  therein, 
  and 
  finally 
  drying 
  and 
  pulverizing 
  the 
  article." 
  

  

  No. 
  263322. 
  

  

  (Azariah 
  F. 
  Crowell, 
  Wood's 
  Holl, 
  Mass. 
  ; 
  patented 
  August 
  29, 
  1382; 
  manufacture 
  of 
  

  

  fertilizers. 
  No 
  drawing.) 
  

  

  Instead 
  of 
  first 
  pressing 
  the 
  fish 
  to 
  extract 
  therefrom 
  the 
  oil 
  and 
  

   gelatinous 
  and 
  nitrogenous 
  liquid, 
  and 
  afterward 
  mixing 
  with 
  the 
  lat- 
  

   ter 
  a 
  superphosphate, 
  as 
  described 
  in 
  a 
  patent 
  to 
  this 
  inventor, 
  dated 
  

   September 
  24, 
  1878, 
  No. 
  20S224, 
  the 
  fish 
  (dogfish, 
  menhaden, 
  &c.) 
  and 
  

   superphosphate 
  are 
  mixed 
  together 
  and 
  cooked 
  by 
  steam 
  or 
  otherwise, 
  

   whereby 
  a 
  greater 
  amount 
  of 
  the 
  gelatinous 
  and 
  nitrogenous 
  matters 
  

  

  