ON  SYRUP  OF  IODIDE  OF  IRON. 
299 
the  boiling  temperature  quite  freely.  Diluted  alcohol  is  a  better 
solvent :  ether  does  not  dissolve  it  at  all.  Water  saturated  at 
212*  solidifies  on  cooling.  Its  formula  is  C12  NH8  0,  S03+HO. 
Dr.  Genth,  of  Philadelphia,  who  has  recently  turned  his  at- 
tention to  the  preparation  of  the  anilin  dyes,  showed  me  a  fine 
sample  of  the  pure  sulphate,  which,  if  a  demand  should  occur, 
can  be  furnished  at  three  dollars  an  ounce,  wholesale,  at  the 
Laboratory  of  Messrs.  Andreykovicz  and  Poizat,  112  Arch 
street,  Philadelphia. 
ON  SYRUP  OF  IODIDE  OF  IRON. 
By  Dr.  W.  H.  Pile. 
To  the  Editor  of  the  American  Journal  of  Pharmacy. 
Dear  Sir, — The  sample  of  Liquor  Ferri  Iodidi  I  send  with 
this  note,  has  been  exposed  to  the  air  in  a  wide-mouthed 
vial  for  several  weeks,  with  no  other  apparent  change  than  an 
increased  density,  arising  from  loss  of  water  by  evaporation. 
As  I  had  previously  been  unable  to  prevent  this  article,  as 
made  by  the  usual  formula,  from  losing  its  fine  green  color  and 
becoming  brown,  when  opened  and  exposed  for  even  a  very 
short  time,  I  give  you  the  method  of  its  preparation,  that  you 
may  judge  whether  the  heat  employed  would  be  objectionable  in 
any  point  of  view. 
R.  Iodine  gij. 
Iron  filings  3j. 
Sugar  Sxvi. 
Water  q.  s. 
Mix  the  iodine  with  four  ounces  of  distilled  water  in  a  porce- 
lain vessel,  and  gradually  add  the  iron,  stirring  constantly,  and 
avoiding  much  increase  of  temperature.  When  the  liquid  ac- 
quires a  light  greenish  color,  filter  it  into  a  boiling  syrup  made 
from  the  16  ounces  of  sugar  with  6  ounces  of  distilled  water. 
When  the  solution  has  all  passed,  pour  two  ounces  more  distil- 
led water  gradually  upon  the  filter  ;  continue  the  boiling  a  few 
minutes  longer,  and  lastly,  when  cold,  add  distilled  water  until 
the  whole  measures  20  fluid  ounces. 
Note  by  the  Editor.  The  formula  suggested  by  Dr.  Pile  is  like  that 
adopted  in  the  Pharmacopoeia  of  1860,  which  is  nearly  as  follows  : 
