AVPTi,i8H73RM-}      New  Tlnct.  of  Chloride  of  Iron.  387 
this  point ;  all  the  iodine  should  be  in  the  state  of  a  ferrous  salt), 
filter  the  liquid  from  undissolved  iron,  rinse  the  iron  with  a  small 
quantity  of  the  distilled  water,  pour  on  the  filter,  and  finally  rinse 
the  filter  ;  now  add  to  the  filtrate  the  remaining  126*8  grains  iodine, 
and  allow  it  to  dissolve  ;  it  forms  a  rich  ruby  red  solution.  Place 
406  grains  of  the  citric  acid  in  a  small  evaporating  dish,  add  one  and 
a  half  fluid-ounces  of  distilled  water,  and  apply  heat  until  the  acid 
dissolves  and  the  liquid  boils ;  without  removing  from  the  fire  add, 
by  small  portions,  sufficient  potassium  carbonate  to  neutralize,  avoid- 
ing an  excess  ;  if  a  slight  excess  should  happen  to  be  present,  correct 
it  by  adding  the  two  grains  citric  acid  reserved  ;  now  pour  as  much 
of  this  solution  of  potassium  citrate  while  hot  into  the  red  solution  as 
will  change  the  color  to  a  bright  green,  and  make  up  the  measure  to 
twenty-six  fluid-ounces  with  simple  syrup.  The  finished  syrup  con- 
tains about  five  grains  of  the  salt  in  each  fluid-drachm,  and  the  dose 
would  be  from  one-half  to  one  teaspoonful. 
The  new  tincture  of  the  chloride  of  iron  can  replace  the  old,  with 
advantage,  in  most  cases  where  the  tonic  effects  are  alone  desired, 
without  any  styptic  action. 
New  Tincture  of  the  Chloride  of  Iron. 
Liq.  ferri  chloridi,  U.S. P.,        .        .  1  fluid-ounce. 
Citric  acid,         .....     544  grains. 
Sodium  carbonate,    ....      1000    "    or  q.  s. 
Water  (distilled),        ....        1  fluid-ounce. 
Alcohol,  .....  a  sufficient  quantity. 
Dissolve  the  citric  acid  in  the  distilled  water,  and  heat  to  the  boiling 
point,  gradually  adding  the  sodium  carbonate  until  the  acid  is 
saturated  (the  quantity  varies  with  the  amount  of  moisture  pre- 
sent in  either),  mix  with  the  iron  solution,  which  will  now  acquire 
a  beautiful  green  color,  and  make  up  the  measure  to  four  fluid-ounces 
with  alcohol. 
One  of  the  strongest  points  in  favor  of  this  series  of  preparations 
is  that  they  can  be  made  to  offer  a  great  variety  of  desirable  combi- 
nations. The  finished  green  solution  of  iodide  of  iron  may  be  evapo- 
rated at  a  low  heat,  and,  as  suggested,  a  salt  formed  which  can  readily 
be  made  into  pills  of  three  grains  each,  and,  of  course,  requiring  no 
insoluble  coating  to  protect  them  ;  it  may  be  dissolved  in  water  in 
almost  any  quantity,  forming  a  simple  solution,  or  in  syrup  to  form 
