66 
CITROMEL  AND  TARTROMEL  OF  IODIDE  OF  IRON. 
Citromel  Ferri  lodidi. 
R.  -  Liq.  Ferri  lodidi,  f.^j. 
Mellis,  ^xij. 
Acidi  Citrici,  £vj. 
Aquae  Distill.  Bullient.,  f.gj.  vel  q.  s. 
Liquify  the  honey  by  means  of  heat,  and  add,  first  the  citric 
acid  previously  dissolved  in  the  water,  then  the  solution  of  iodide  of 
iron;  mix  well  together,  making  up  f-^xij.  with  distilled  water, 
and  filter. 
Tartromel  Ferri  lodidi. 
R.    Liq.  Ferri  lodidi,  f.gj.' 
Mellis,  gxij. 
Acidi  Tartarici,  §ss. 
Aquae  Distillat.  Bullient,,  f.^j.  vel  q.  s„ 
Proceed  as  directed  for  the  Citromel. 
These  preparations  are  about  the  same  strength  as  the  syrup 
of  the  Pharmacopoeia. 
The  Liquor  Ferri  lodidi  indicated  contains  an  ounce  of  iodide 
in  a  fluid  ounce,  and  may  be  conveniently  made  as  follows  : — 
Take  of  Purified  Iodine,  givss. 
Iron  Wire  or  Filings,  ^iss. 
Distilled  W ater,  q.  s, 
Put  the  iron  into  a  flask  with  three  ounces  of  distilled  water, 
and  add  the  iodine  a  little  at  a  time,  allowing  the  solution  to 
cool  after  each  addition.  When  the  whole  has  been  added,  set 
aside  for  a  day  or  two  and  then  filter,  washing  the  insoluble  resi- 
due with  sufficient  recently  boiled  distilled  water  to  make  up 
five  fluid  ounces  and  a  half  of  clear  solution. 
The  Citromel  and  Tartromel  Ferri  lodidi  will  keep  for  an 
almost  unlimited  period,  even  in  bottles  that  are  frequently  open- 
ed to  take  out  small  quantities.    They  will  also  keep  well  when 
diluted,  and  in  this  respect  they  have  a  remarkable  superiority 
over  the  syrup  of  iodide  of  iron.    The  following  mixture  has 
been  kept  more  than  a  year  without  any  particular  care,  and  did 
not  manifest  the  slightest  tendency  to  decomposition  : — 
R.    Citromellis  Ferri  lodidi,  f.3j. 
Tinct.  Gentianae  Com.,  i.z'y 
Aquae  Distillate,  f.^xiv.  M. 
I  shall  not  attempt  to  explain  the  modus  operandi  of  the  citric 
