472 
Assay  of  Heart  Tonics. 
j  Am.  Jour.  Ph»rm 
\     October,  1909 
vallaria  shows  how  accurately  these  figures  correspond  with  the  re- 
sults obtained  in  routine  practice  in  a  large  manufacturing  laboratory. 
TABLE  VIII. 
FLUID  EXTRACT  CONVALLARIA  (RHIZOME  AND  ROOTS),  7TH  AND  STH  REVISIONS. 
M.  F.  D. 
Units 
.OOOI4 
71 J 
.0001 5 
666 
.00018 
.00020 
500 
.00021 
476 
-+/ 
.00022 
454 
.00024 
416 
.00025 
400 
.00026 
384 
.00027 
370 
.00029 
344 
.00031 
322 
.00032 
312 
.00033 
303 
.00034 
294 
.OOO36 
277 
.00039 
256 
.00040 
250 
.00045 
222 
Summary — Fluid  Extract  ConvaHana :    Rhizome  and  Roots. 
H.  T\  U.; 
M.  F.  D.  per  Cc 
Standard  adopted  in  1900  00025  400 
Average  for  30  samples   406 
Proposed  standard    400 
TABLE  IX. 
5  PER  CENT  TINCTURE  STROPH  ANTHUS,  U.  S.  P.  1890. 
No.  M.  F.  D.  Units. 
11  OOO 1 1  909 
12   OOOI2  J$25 
9   00013  769 
II  OOOI4  714 
20   00015  666 
21   00016  625 
7   00017  588 
15   00020  50a 
9   00030  333 
11    .00040  250 
8  00050  200 
Summary — Tincture  of  Strophanthu.s,  U.  S.  P.  1890  (5  per  cent). 
M.  F.  D.  Units. 
Standard  adopted  in  1897   0.00015  666 
Average  for  134  samples  tested  since  1901   0.000167  598 
Proposed  standard  U.  S.  P.,  1900.  Tr.  10  per  cent.  1200  H.  T.LT.s  per  Cc. 
(See  also  Table  VII.) 
