PHARMACEUTICAL  NOTICES. 
115 
acetic  acid  (or  even  less)  to  the  pint,  for  instance,  of  pineapple, 
strawberry  or  raspberry  syrup,  would  be  entirely  preventive  of 
fermentation,  and  probably  render  them  more  wholesome,  as  less 
luscious  and  cloying,  and  more  grateful  and  refreshing  in  hot 
weather. 
Ammonio-ferric  Alum  In  the  Am.  Journ.  of  Pharmacy  for 
1856,  pages  305  and  478,  I  made  some  remarks,  introducing  to 
notice  the  "Ammonio-ferric  Alum"  or  sulphate  of  ammonia  and 
of  sesquioxide  of  iron,  with  a  formula  for  its  preparation.  This 
combination  having  been  since  found  by  many  physicians  to 
answer  the  description  given  by  Dr.  W.  Tyler  Smith,  of  its  ad- 
vantages as  an  astringent  tonic,  the  demand  for  it  has  occasioned 
the  necessity  for  repeatedly  preparing  it;  and,  profiting  by  the 
suggestions  of  some  of  my  friends,  I  have  improved  the  process 
for  its  preparation,  so  as  to  make  it  much  more  readily,  perfectly 
and  economically,  thus: 
B.    Ferri  sulphatis  cryst.  ^xxiv. 
Ammonite  sulphatis,  gxiss. 
Acidi  sulphurici,  f.gv.  f.^v. 
Acidi  nitrici,  f.^iij.  vel  q.  s. 
Aquae,  q.  s. 
Mix  f.^xxj.  of  the  sulphuric  acid,  in  a  large  mortar,  with  the 
sulphate  of  iron  coarsely  powdered ;  then  gradually  add,  with 
trituration,  the  nitric  acid,  till  it  ceases  to  produce  effervescence, 
Transfer  the  mixture  to  a  porcelain  capsule,  and  boil  it  with  one 
quart  of  water,  added  in  two  or  three  portions  successively. 
Then  add  the  remaining  f.^iij.  of  sulphuric  acid,  and  the  sulphate 
of  ammonia;  boil  till  the  latter  is  entirely  dissolved,  and  set 
aside  in  a  cool  place  to  crystallize.  If  the  resulting  crystals 
are  not  sufficiently  pure  and  violet-colored,  they  must  be  re-dis- 
solved by  boiling  in  about  a  pint  of  water,  acidulated  with  an 
ounce  or  two  of  sulphuric  acid,  filtered  or  decanted,  and  again 
set  aside  to  crystallize.  The  crystals  must  then  be  drained,  and 
dried  in  bibulous  paper,  before  being  bottled  up.  In  this 
way  we  obtain  very  handsome,  somewhat  amethystine  crys- 
tals. 
Tinctura  Cannabis  Indicw. — It  is  probable  that  the  druggists 
of  the  United  States,  in  making  this  preparation,  generally 
