Am.  Jour.Pharm.  ) 
April,  1876  / 
Syrup  of  Ferrous  Iodide. 
J57 
only  a  flavoring  ingredient  is  wanted  ;  but  where  something  is  needed 
to  disguise  the  taste  of  a  medicine  prescribed,  the  syrup  containing  the 
resin  would  answer  an  excellent  purpose,  as  it  has  a  very  strong  taste, 
precisely  like  that  of  the  root,  and  at  the  same  time  so  pleasant  as  to 
be  agreeable  to  the  taste  of  almost  every  one. 
The  preparation  of  the  above  syrups  may  be  comprised  in  the  fol- 
lowing formulae  : 
Syrup  of  As  arum  (first  process). 
Fl.  ext.  of  asarum,        .  .  .  .  f^i 
White  sugar,  .....  ^xv 
Water,  .....  f^viii 
Triturate  one-half  the  sugar  with  the  fluid  extract,  and  heat  moder- 
ately to  evaporate  the  alcohol.  Add  the  remainder  of  the  sugar,  then 
the  water  ;  raise  to  boiling  point,  and  strain. 
This  gives  rather  more  than  a  pint  of  syrup  of  a  light  color,  and 
with  only  a  slight  turbidity. 
Syrup  of  Asarum  (second process.) 
Fl.  ext.  of  asarum,  .....  f^i 
Magnesium  carbonate,  ....  grs.  cxx 
White  sugar,  .....  ^xv 
Water,  .....  f  3  viii 
Rub  the  fluid  extract  with  the  carbonate  of  magnesium  and  a  small 
quantity  of  sugar,  and  then  with  the  water,  gradually  added,  and  filter. 
To  the  filtered  liquid  add  the  remainder  of  the  sugar,  dissolve  with  the 
aid  of  a  gentle  heat,  and  strain. 
NOTE  ON  SYRUP  OF  FERROUS  IODIDE. 
BY  J.   F.  JUDGE. 
(Read  before  the  Cincinnati  College  of  Pharmacy.) 
When  proper  care  is  taken  in  the  preparation  of  Syrup  of  Ferrous 
Iodide,  a  product  is  obtained  of  a  pale  green  tint,  which,  if  kept  in  full 
and  well  stopped  bottles,  does  not  change  color  ;  but  it  occasionally 
happens  that  from  some  defect  or  other  in  the  process,  the  syrup  does 
not  retain  its  pale  green,  but  assumes  a  brownish  hue. 
Some  years  since,  hyposulphite  of  sodium  was  proposed  as  an  agent 
capable  of  restoring  the  syrup,  when  discolored,  to  its  normal  tint.  In 
producing  this  change,  sodium  hyposulphite,  by  its  affinity  for  oxygen, 
passes  into  sodium  sulphate,  and  in  so  doing  parts  with  one-half  of 
the  sulphur  it  contains,  thus  :  Na2S203+H20+I2=Na2S04+2HI+S. 
