﻿Commissioner 
  of 
  Ageiculture, 
  479 
  

  

  raw 
  or 
  boiled 
  oil, 
  but 
  figures 
  as 
  liigli 
  as 
  7 
  may 
  indicate 
  that 
  the 
  

   oil 
  is 
  old 
  rather 
  than 
  adulterated, 
  and 
  a 
  still 
  higher 
  figure 
  may 
  

   prove 
  to 
  be 
  due 
  to 
  the 
  presence 
  of 
  mineral 
  a,cid 
  from 
  refining. 
  

  

  6. 
  Detei-mine 
  the 
  Koettstorfer 
  figure. 
  This 
  should 
  not 
  be 
  less 
  

   than 
  187 
  in 
  the 
  case 
  of 
  raw 
  oil, 
  nor 
  less 
  than 
  186 
  in 
  the 
  case 
  of 
  

   boiled 
  oil, 
  and 
  in 
  neither 
  case 
  should 
  be 
  higher 
  than 
  196. 
  

  

  7. 
  If 
  the 
  appearance, 
  odor, 
  etc., 
  of 
  an 
  oil 
  point 
  to 
  the 
  presence 
  

   of 
  fish 
  oil, 
  apply 
  Maumene's 
  and 
  Livache's 
  tests. 
  

  

  Adulteration 
  will 
  usually 
  be 
  indicated 
  by 
  more 
  than 
  one 
  test, 
  

   and 
  if 
  abnormal 
  figures 
  are 
  obtained 
  by 
  one 
  process 
  pointing 
  

   to 
  a 
  certain 
  kind 
  of 
  adulteration, 
  while 
  others, 
  which 
  would 
  also 
  

   be 
  expected 
  to 
  be 
  abnormal, 
  are 
  not 
  so, 
  it 
  is 
  evident 
  that 
  some 
  

   new 
  adulterant 
  is 
  to 
  be 
  sought 
  for, 
  or 
  that 
  the 
  oil 
  has, 
  perhaps, 
  

   been 
  made 
  by 
  some 
  unusual 
  process. 
  

  

  Detection 
  and 
  D^etermination 
  of 
  the 
  Several 
  Adulterants. 
  

  

  1. 
  Nonvolatile 
  mineral 
  oil. 
  Indicated 
  by 
  low 
  bromine 
  absorp- 
  

   tion, 
  low 
  bromine 
  addition 
  figure, 
  low 
  Koettstorfer 
  figure, 
  and 
  low 
  

   specific 
  gravity. 
  Separated 
  and 
  weighed 
  together 
  with 
  rosin 
  oil 
  as 
  

   unsaponifiable 
  matter, 
  and 
  separated 
  from 
  rosin 
  oil 
  by 
  nitric 
  acid. 
  

  

  2. 
  Benzine. 
  Indicated 
  by 
  odor, 
  low 
  specific 
  gravity, 
  low 
  Koetts- 
  

   torfer 
  and 
  bromine 
  addition 
  figures, 
  and 
  low 
  bromine 
  absorption. 
  

   Separated 
  and 
  weighed 
  or 
  measured 
  together 
  with 
  turpentine, 
  as 
  

   volatile 
  oil, 
  by 
  distillation 
  with 
  steam, 
  and 
  separated 
  from 
  turpen- 
  

   tine 
  with 
  fuming 
  nitric 
  acid. 
  

  

  3 
  Turpentine. 
  Indicated 
  by 
  odor, 
  low 
  specific 
  gravity, 
  low 
  

   Koettstorfer 
  figure, 
  and 
  high 
  bromine 
  absorption, 
  bromine 
  addi- 
  

   tion 
  figure 
  and 
  bromine 
  substitution 
  figure. 
  Separated 
  and 
  

   weighed 
  together 
  ^\'ith 
  benzine 
  as 
  volatile 
  oil 
  by 
  distillation 
  with 
  

   steam, 
  and 
  determined 
  by 
  difference, 
  after 
  treating 
  the 
  volatile 
  oil 
  

   with 
  fuming 
  nitric 
  acid 
  and 
  hot 
  water. 
  

  

  4. 
  Rosin 
  oil. 
  Indicated 
  by 
  high 
  specific 
  gravity, 
  low" 
  Koettstor- 
  

   fer 
  figure, 
  often 
  high 
  acid 
  figure, 
  low 
  bromine 
  absorption 
  and 
  bro- 
  

   mine 
  addition 
  figure, 
  and 
  high 
  bromine 
  substitution 
  figure. 
  Sepa- 
  

   rated 
  and 
  weighed 
  together 
  with 
  nonvolatile 
  mineral 
  oil 
  as 
  un- 
  

   saponifiable 
  matter, 
  and 
  determined 
  by 
  difference, 
  after 
  treating 
  

   the 
  mixture 
  with 
  nitric 
  acid. 
  

  

  