442 
Formulas. 
J  Am.  Jour.  Pharm» 
1      Sept.,  1877. 
quite  white.  By  the  use  of  oleic  acid  it  matters  not  what  kind  of  oil 
is  taken  ;  6  to  10  drops  to  the  pint  of  liniment  is  sufficient. 
FORMULAS  and  PREPARATIONS  of  new  MEDICAMENTS. 
By  the  Editor. 
(Continued  from  page  351) 
Ferrocyanhydrate  of  Quinia.— Four  parts  of  quinia  sulphate  and 
enough  distilled  water  to  form  a  not  too  thick  mixture  are  mixed  with 
a  concentrated  solution  of  one  part  of  ferrocyanide  of  potassium,  the 
whole  is  heated  to  boiling  for  a  few  seconds,  and  then  allowed  to  cool. 
The  mother  liquor,  from  which  more  of  the  salt  is  obtained  on  con- 
centration, is  poured  off  from  the  resin-like  mass,  the  latter  washed 
with  hot  water  and  crystallized  from  boiling  alcohol.  It  is  in  small 
yellowish  needles,  bitter,  slightly  soluble  in  water,  freely  in  alcohol,  and 
efflorescent  in  the  air. 
Bromhydrates  of  Quinia. — The  basic  salt  is  obtained  by  heating 
10  grams  of  quinia  sulphate  with  80  grams  of  water  to  boiling,  and 
adding  3*40  grams  dry  barium  bromide,  dissolved  in  20  grams  of  water  j 
the  sulphate  of  barium  is  filtered  off  and  the  filtrate  evaporated  and 
crystallized.  It  forms  silky  needles,  which  require  60  parts  of  cold 
water  for  solution. 
The  neutral  salt  is  made  in  a  similar  manner,  except  that  the  quinia 
is  dissolved  by  the  aid  of  just  sufficient  sulphuric  acid,  and  6*8o  grams 
of  barium  bromide,  dissolved  in  25  grams  of  water,  are  used  for  decom- 
position ;  the  mixture  is  heated  to  boiling,  filtered,  the  filtrate  evapor- 
ated to  35  grams,  and  crystallized.  It  crystallizes  in  handsome  prisms, 
which  are  soluble  in  7  parts  of  cold  water,  and  freely  soluble  in  alcohol 
and  hot  water.     Both  salts  must  be  free  from  barium. 
Tannate  of  Quinia. — To  a  neutral  solution  of  quinia  salt  add  a 
solution  of  gallotannic  acid,  free  from  resinous  matter,  until  the  white 
precipitate  is  redissolved  ;  neutralize  exactly  with  solution  of  bicarbon- 
ate of  sodium,  whereby  the  quinia  tannate  will  be  precipitated  ;  collect 
upon  a  filter,  drain,  dry,  powder  and  wash  with  distilled  water  ;  then 
dry  again.  It  is  a  white  amorphous  powder,  3*5  parts  of  which  corres- 
pond with  1  part  of  quinia  sulphate  ;  if  prepared  from  the  latter  salt, 
it  always  retains  a  certain  quantity  of  sulphuric  acid. 
