The  Opium  Assay  Method. 
/Am.  Jour.  Pharm. 
1  September,  1894. 
No.  i.      No.  2. 
Hours  allowed  for  \ 
the  precipitation  \  6% 
of  the  morphine.  J 
Weight  of  crude] 
morphine  in| 
counter-balanced  r 
filters. 
263  !  1-329 
Weight  of  crude  1 
morphine  re-  I 
moved  to  watch-  j  ,  r2555  i*3I3 
crystal.  j 
Difference  between  1 
these  two  weigh-  Y     0-0075  0*016 
ings.  J 
Ash  as  calcium  ] 
carbonate  from 
0*5    gram  crude 
M    0*002     '  0012 
morphine.  J 
Correction  based 
upon  the  ash  cal- 
culated to  whole  U    0-013    ■  o-o8r 
weight    of   mor-  j  I 
phine.  J 
Corrected    weight  1 
of  morphine.        }     T'2425  ^232 
0-5     gram  crude] 
morphine     d  i  s  - 
solved  in  50  cc. 
lime  water  left  a 
residue  weighing. 
*  I    0  0025  !  0-030 
The  lime  water  re-  ] 
sidue    calculated  !  r 
to  entire  weight  |  °'°°62 
of  morphine.  J 
Corrected  weight 
of  morphine. 
1  234 
No.  3. 
21 
I-4505 
i'45i 
No.  4.      No.  5.      No.  6. 
1-403 
I-3925 
0*0105 
0-0195 
o-i45 
1-306 
0-014 
1-378 
0-064    I  0*0205 
o*i86  •[  0*057 
1-265 
1-335 
i-235 
1-2305 
0-0045 
•275 
1-267 
0008 
0-0135 
0-0063  0*088 
1-224 
1-187 
o-ooi  0*031 
0-0035 
1.228 
079 
1*196 
In  these  assays,  the  ethereal  solutions  and  the  mother-liquor  were 
collected  together,  while  each  of  the  washing  liquids — water,  alcohol 
and  ether — were  collected  separately. 
In  washing  with  water  the  same  turbidity  and  separation  of  precipi- 
tate was  noticed  as  before  ;  the  aqueous  washings  amounted  to  about 
thirty  cubic  centimetres  to  give  an  almost  colorless  filtrate,  in  all 
