410         Assaying  Galenical  Preparations  of  Oj)Uim.{Am-^r-^0aTm 
The  following  are  fair  examples,  selected  from  a  large  number  of 
comparative  assays : 
Number  of 
Kxperiment. 
Different  lot  Crude 
Opium. 
Actual  yield  of 
Morphine  in 
grams. 
Calculated  to 
percent,  pure 
Morphine. 
Corrections. 
0)  0 
e  M 
5  •• 
^  n-v 
Method. 
1 
A. 
■ 
10-4 
17-9 
Partly 
insolub. 
Squibb, 
4  days. 
2 
o*53 
io*6 
None 
Clear, 
colorless 
Fli'ickiger, 
1  day. 
B. 
solution^ 
3 
r  ni 
i-o8 
9'3 
16-6 
14-2 
Partly 
insolub. 
Squibb. 
4 
5  grams  powdered,  .  . 
6  "     crude,  .... 
°*577 
.  0-571 
9'5 
None 
Fluckiger. 
5 
C. 
5  grams  powdered,  .  . 
6  "     crude,  .... 
r  0-542 
L  0-540 
9 
None 
Fluckiger. 
-  € 
C. 
io  grams  crude,     .  .  . 
1*22 
10*7 
12 
Stillwell. 
7 
D. 
5  grams  powdered,  .  . 
6  "     crude,  .... 
\ 
f  0-592 
L  0-591 
9-81 
None 
Clear, 
colorless, 
soluble. 
Fluckiger. 
S 
io  grams  crude,    .  .  . 
\ 
r  1-308 
L  1*302 
n-6 
II-2 
Squibb. 
Squibb's  process  (a  modification  of  Fliickiger's  former  one).  Ex- 
haustion with  water  rejects  the  resinous  substances,  and  concentra- 
tion to  a  small  volume,  with  subsequent  addition  of  alcohol,  rejects 
starch,  gum,  sugar,  etc.  Squibb  uses  water  slightly  acidulated  with 
diluted  sulphuric  acid  (1  or  2  drops  to  10  gm.  opium),  exhausting 
thoroughly.  He  differs  from  Fluckiger  in  not  using  a  fractional 
part  of  the  filtrate,  but  all  of  it,  and  evaporates  to  a  weight  equal 
to  that  of  the  opium,  and  never  to  more  than  \y2  times  the  opium. 
His  further  directions  are :  Transfer  to  a  flask  and  rinse  with  the 
