35o 
Formulas. 
( Am.  Jour.  Pharm. 
\      July,  1877. 
Syrup  of  Pyrophosphate  of  Iron  and  Sodium. — Dissolve  25 
grams  of  sodium  pyrophosphate  in  250  grams  of  distilled  water,  and  5 
grams  of  dry  ferric  sulphate  in  100  grams  of  water  ;  add  this  last  to  the 
former  solution,  and  in  the  clear  and  colorless  liquid  dissolve  620  grams 
of  sugar. 
The  solutions  of  the  two  last  preparations  are  obtained  by  omitting 
the  sugar  and  adding  enough  distilled  water  to  make  1  liter  of  solution. 
Glycerites  of  subnitrate  of  bismuth,  of  laudanum,  of  extract 
of  lead  and  of  extract  of  rhatany  are  made  with  90  parts  glycerite 
of  starch  by  mixing  it  intimately  with  10  parts  of  subnitrate  of  bis- 
muth, of  Sydenham's  Laudanum,  of  Goulard's  Extract,  or  of  extract  of 
rhatany,  the  latter  to  be  previously  dissolved  in  the  smallest  possible 
quantity  of  glycerin. 
Tar  Water. — The  wood  tar  should  be  of  a  red-brown  color,  trans- 
parent and  free  from  resinous  deposits.  Mix  5  grams  of  such  tar  inti- 
mately with  10  grams  of  pine-wood  sawdust,  and  macerate  for  24  hours 
with  1,000  grams  of  distilled  or  rain  water,  stirring  frequently. 
Syrup  of  Tar. — 15  grams  of  tar  and  30  grams  pine-wood  sawdust  are 
mixed,  and  digested  at  6o°C.  with  1,000  grams  water,  with  occasional 
agitation.  Filter  at  the  end  of  two  hours  upon  the  sugar,  190  grams 
of  which  are  to  be  used  for  every  100  grams  of  the  filtrate,  and  effect 
the  solution  in  a  closed  vessel,  heating  it  by  means  of  a  water  bath. 
Syrup  of  lodotannin,  Strop  lodotannique. — Dissolve  1  gram  of 
iodine  in  11  grams  of  90  per  cent,  alcohol,  add  to  syrup  of  rhatany 
(containing  2"5  per  cent,  of  extract  of  rhatany)  988  grams,  and  mix 
well.  The  combination  will  be  completed  at  the  ordinary  temperature 
in  24  hours,  when  the  syrup  has  again  its  original  color. 
Iodinized  syrup  of  horseradish  is  made  in  precisely  the  same  way 
as  the  preceding,  substituting  the  same  weight  of  compound  syrup  of 
horseradish. 
Syrup  of  Iodide  of  Starch. — Dissolve  10  grams  of  soluble  iodide 
of  starch  in  330  grams  of  distilled  water,  and  use  this  solution  for  dis- 
solving 640  grams  of  sugar,  by  the  aid  of  a  gentle  heat. 
Pilocarpina. — The  leaves  or  bark  of  Pilocarpus  pennatifolius  are 
exhausted  with  80  per  cent,  alcohol,  containing  in  the  liter  8  grams  of 
hydrochloric  acid,  and  the  tincture  is  distilled  and  evaporated  to  the  con- 
sistency of  a  liquid  extract,  which  is  mixed  with  a  small  quantity  of 
