m'Mv?i,™T'}         Aromatic  Sulphuric  Acid.  509 
acteristic),  I  devised  the  following  formula,  which,  I  believe,  produces 
the  intended  preparation,  i.  e.,  a  diluted  aromatic  sulphuric  acid  of  a 
dark-red  color  : 
R.  Sulph.  Acid,  C.  P.,  .  .  .  troy,  Jjvi.  (6). 
Alcohol,  95  per  cent.,  ...  Oi.  (1). 
m.  s.  a. 
When  cool,  add  the  following  flavoring  mixture  : 
R.  Oil  Cinnamon,  ....  gttv.  (5). 
"  Ginger,         .....      gttvii.  (7). 
Alcohol,         ...  .  f^xiv.    (14).  ^r 
Afterward,  add  the  following  coloring  mixture  : 
R.  Rosse  Gallicae  Petal.  ^i.  (l). 
Aquae  Bullientis,       .  .  .  .  .     q.  s. 
Pour  the  boiling  water  on  the  rose  leaves,  and  express  ^ii  (2),  then 
filter  the  entire  preparation,  and  it  will  remain  clear  and  unchangeable^ 
and  will  mix  with  water  without  forming  any  precipitate. 
As  the  propriety  of  using  the  oils  may  be  questioned,  I  will  quote 
from  the  U.  S.  Dispensatory  on  the  properties  of  aromatic  sulphuric 
acid : 
"  It  must  be  viewed  merely  as  sulphuric  acid  diluted  with  alcohol^ 
and  containing  the  essential  oils  of  ginger  and  cinnamon." 
The  red-rose  petals  produce  the  desired  color. 
The  proportion  of  oil  was  arrived  at  by  an  estimate  of  the  average 
amount  of  oil  contained  in  ginger  and  cinnamon. 
By  this  method  a  very  little  water  is  introduced,  displacing  an 
equal  bulk  of  alcohol ;  but  if  ninety-five  per  cent,  of  alcohol  is  used7 
this  slight  reduction  will  not  admit  of  any  practical  objection. 
It  is  over  three  years  since  I  first  prepared  some  aromatic  sulphuric 
acid  by  this  process,  and,  since  then,  I  have  submitted  it  to  the  use  of 
several  physicians.  I  have  also  carefully  watched  for  any  changes  in 
it  while  standing  in  the  store,  and,  finding  only  favorable  results,  I 
now  submit  the  formula  to  the  consideration  of  "  whomsoever  it  may 
concern."  * 
Leominster,  Mass.,  October,  1874. 
*In  the  American  Journal  of  Pharmacy,  1867,  p.  201,  Mr.  Thos.  N.  Jamieson 
proposed  to  make  aromatic  sulphuric  acid  from  oil  of  cinnamon,  twelve  minims  . 
tincture  of  ginger,  two  fluidounces  ;  alcohol,  twenty-four  fluidounces  ;  sulphuric 
acid,  six  troyounces,  and,  if  desirable,  to  color  with  saunders,  or,  preferably,  with 
cudbear.  Most  modern  Pharmacopoeias  direct  this  preparation  to  be  made 
from  the  drugs,  like  the  U.  S.  P. ;  it  has  been  discontinued  in  some,  as  in  the 
French  Codex  since  1866. — Editor  Amer.  Jour.  Phar. 
