Am.  Jour.  Pharm. 
May,  1876. 
A  Singular  Reaction. 
21 1 
to  ascertain  their  freedom  from  or  the  presence  of  the  various  impuri- 
ties to  which  it  is  most  liable,  several  samples,  from  some  of  the  lead- 
ing pharmacists  of  this  city,  were  examined,  with  the  following  results  :: 
No.  of 
O  4.1 1 J 1  U1C. 
Amount  of 
Ferric 
Oxide  to  f^i. 
Anhydrous 
Hydrochloric 
Acid  to  f^i. 
Nitric  Acid. 
Ferrous  Oxide. 
Precipitate 
formed 
on  standing. 
I 
22*6 
grs. 
35-2  grs. 
Absent 
Absent 
None 
2 
27-4 
« 
40-3 
tt 
Present 
(< 
Slight 
3 
287 
a 
35'7 
tt 
Absent 
tt 
None 
4 
26-9 
a 
33*8 
tt 
tt 
a 
• 
a 
5 
28-9 
a 
44-8 
a 
a 
Trace 
it 
6 
17*5 
a 
30-1 
a 
a 
Considerable 
Slight 
7 
32-2 
a 
37-o 
tt 
Trace 
Absent 
None 
8 
307 
a 
46*3 
tt 
it 
it 
Considerable 
9 
27-9 
a 
35'4 
tt 
a 
a 
None 
10 
23'4 
a 
34*9 
a 
Absent 
it 
n 
From  the  above  table  it  will  be  seen  that  the  samples  examined  do 
not  vary  very  greatly  in  regard  to  ferric  strength,  except  in  one  case, 
while  in  two  samples  the  ferric  strength  exceeded  the  officinal  stan- 
dard. The  difference  in  the  color  of  the  samples  was  quite  noticeable, 
varying  from  pale  lemon  to  rich  brownish-orange,  the  depth  of  shade 
varying  with  the  proportion  of  the  iron  and  the  amount  of  acid.  Ac- 
cording to  the  present  process,  there  is  no  excuse  for  any  great  deficiency 
in  strength,  as  by  further  addition  of  the  liquor  it  can  readily  be  brought 
up  to  the  standard,  if  from  any  cause  the  liquor  should  be  wanting  in. 
that  direction. 
A  SINGULAR  REACTION. 
BY  JOSEPH   P.  REMINGTON,  PH.G. 
[Read  at  the  Pharmaceutical  Meeting,  April  i$th.) 
The  following  prescription  was  sent  to  Prof.  J.  M.  Maisch  by  Jos. 
W.  Hall,  of  Nashville,  Tenn.,  who  states  in  his  letter  that  he  noticed 
a  reaction  of  a  very  singular  nature  take  place  when  the  various  in- 
gredients were  mixed  together  ;  when  first  prepared  the  color  being 
a  dark-red,  but  changing  in  a  few  hours  to  a  beautiful  dark-green.  It 
is  as  follows: 
