Am.  Jour.  Pharm. 
Dec,  1883. 
Iodine  in  Cod  Liver  Oil. 
615 
In  the  first  experiment  the  solution  was  tested  at  once  in  the  manner 
indicated.  In  the  second,  the  solution  was  neutralized  with  hydrochloric 
acid  in  the  presence  of  the  carbon  bisulphide,  no  iodine  was  eliminated 
until  the  nitrosulphuric  acid  was  added.  In  the  third,  the  solution 
was  neutralized  with  hydrochloric  acid  before  the  addition  of  the  test 
solutions.  Little  difference  was  noticed.  The  following  six  specimens 
were  selected  : 
No.  1.  Cod  liver  oil,  pale. 
No.  2.  Cod  liver  oil,  Norway. 
No.  3.  Cod  liver  oil,  manufactured  by  Carr  &  Sons,  Berwick-on- 
Tweed. 
No.  4.  Cod  liver  oil,  English. 
No.  5.  Cod  liver  oil,  Newfoundland. 
No.  6.  Light  brown  cod  liver  oil. 
The  mean  proportions  of  iodine  found  were  per  cent. — 
No.  1.  0-000410 "] 
No.  2.  0-000434  | 
No.  3.  0-000276  y  Mean  percentage'of  iodino. 
No.  4.  0-000138  f  0  000322.  ' 
No.  5.  0-000315  1 
No.  6.  0.0003B0  J 
I  also  estimated  the  iodine  in  fresh  cod  liver ;  the  fishmonger 
informed  me  that  it  is  not  yet  in  season,  but  the  result  is  here  appended. 
Five  thousand  grains  were  treated  in  the  same  manner  as  the  oil. 
Having  stated  on  a  former  occasion  (B.  Pharm.  Conference,  Liverpool) 
that  the  oil  vomited  by  the  fulmar  (Fulmaris  glacialisf  of  St.  Kilda, 
and  which,  though  obtained  from  a  bird,  has  the  reactions  of  a  fish 
liver  oil,  contains  iodine,  I  have  also  estimated  this  amount.  Five 
thousand  grains  were  treated  in  the  same  way  as  the  cod  liver  oil. 
Cod  liver  oil  drag^es  are  stated  to  be  made  of  cod  liver  from  which 
the  oil  has  been  removed ;  an  analysis  of  these  is  also  appended.  One 
thousand  grains  or  173  of  the  dragees  were  employed  and  saponified 
with  200  grains  of  caustic  soda.  These  are  extremely  rich  in  iodine, 
and  would  form  a  valuable  source  of  that  element  if  they  can  be  pro- 
cured cheap  enough  to  contend  with  the  present  low  prices.  I  notice, 
however,  that  a  box  of  250  dragfe  sells  at  5s.,  and  is  considered  (by 
the  maker)  to  be  equal  to  6  pints  of  oil,  so  that  the  quantity  employed 
would  be  equal  to  83  ounces  or  36,312  grains,  or  about  seven  times 
^  Pharmaceutical  Journal^  Nov.  1870. 
