Am.  Jour.  Pharm. ) 
January,  1900.  J 
Substitute  for  Ethyl  Alcohol. 
7 
The  ioo  c.c.  of  the  alcoholic  U.S. P.  menstruum  weighed  86-91 
grammes,  and  the  100  c.c.  of  the  acid  menstruum,  101-21  grammes. 
These  weights,  subtracted  from  the  differing  weights  of  the  frac- 
tions, give  the  difference  between  the  weight  of  the  menstruum  and 
the  weight  of  the  tractions,  and  thus  give  a  useful  indication  of  the 
rate  and  degree  of  exhaustion.    Each  successive  five  fractions  were 
RATIO  AND  DEGREE  OF  EXHAUSTION  BY  DIFFERENCES  AND  BY  ASSAY. 
Differences. 
Extract. 
Chloroform  Ext. 
Alkaloids. 
Fractions 
of 
Percolate. 
U.S.P. 
Men- 
struum. 
Acetic 
Men- 
struum. 
U.S.P. 
Men- 
struum. 
Acetic 
Men- 
struum. 
U.S.P. 
Men- 
struum. 
Acetic 
Men- 
struum. 
U.S.P. 
Men- 
struum. 
Acetic 
Men- 
struum. 
C.c. 
1st.  100  .  .  . 
Gms. 
3-82 
Gms. 
13*57 
P.  c. 
P.  c. 
P.  C. 
P.  C. 
P.  C. 
P.  C. 
2d.  100  .  .  . 
3-63 
12*92 
3d.  100  .  .  . 
370 
10*79 
4th.  IOO    .   .  . 
4'°5 
8*12 
5th.  100   ..  . 
4"59 
5-36 
1st.  500  ..  . 
21*48 
51*85 
I2'7 
30*1 
•2*30 
1 '30 
0*634 
0*605 
6th.  100  ..  . 
4'57 
3*62 
7th.  100  .  .  . 
3'59 
1*46 
8th.  100  .  . 
277 
■72 
9th.  100  ..  . 
2'39 
•51 
10th.  100  .  .  . 
1-99 
•42 
* 
2d.  500  .  .  . 
17*45 
7*27 
6'5 
4*2 
0*30 
°'45 
0*036 
0*072 
nth.  100  .  .  . 
1*46 
'33 
12th.  100  ..  . 
'99 
•30 
13th.  100  .  .  . 
•81 
•18 
14th.  100  ..  . 
•55 
•19 
15th.  100  ..  . 
•43 
•09 
3d.  500  ..  . 
5*33 
ri3 
2'0 
07 
0*10 
006 
0*007 
0*006 
16th.  100  ..  . 
•33 
•06 
17th.  100  ..  . 
•14 
•12 
18th.  100  ..  . 
•20 
•09 
19th.  100  .  .  . 
•00 
*co 
20th.  TOO   .  .  . 
•00 
•00 
4th.  500  .  .  . 
3"i4 
•26 
1."  1 
0*5 
0*10 
o*o6 
0*006 
0*005 
0*683 
0*688 
