Am(n^"s[;iP9iom1'}  Standardization  of  Drugs.  365 
TABLE  II. 
Mgs.  dig.  per    '  Mgs.  Mgs. 
cat  unit.                                          Dig.  -J-  ouabain. 
A.    75.2    49  +  0.0351 
A.  73.5    49  +  0-0333 
B.  81.8   35  +  0.0572 
C.  81.6   70  +  0.0142 
D.  92.3    60  +  0.0350 
D.  102.6   60  +  0.0414 
E.  96.1    80  +  0.0168 
The  figures  in  the  first  column  show  the  number  of  milligrammes 
of  digitalis  computed  to  equal  1  cat  unit ;  those  in  the  second  and 
third  columns  indicate  the  digitalis  and  ouabain  actually  used. 
TABLE  III. 
Mgs.  digitalis 
per  cat  unit. 
A.    Ger.  (old)  tr.  .  .   96.6 
A   91.0 
A   97-o 
A   122.0 
B.  Ger.  (new)  tr   96.0 
B.  Ger.  (new)  tr   98.7 
C.  Ger.  (new)  inf   96.6 
C.1  Ger.  (new)  inf  ,   98.0 
C.  Ger.  (new)  inf   103.0 
D.  2  Eng.  (new)  tr   113.7 
D.2  Eng.  (new)  tr   i*3-7 
D.    Eng.  (new)  inf   1 15.0 
D.    Eng.  (new)  inf   122.0 
D.    Eng  (new)  inf   110.0 
D.    Eng.  (new)  inf   106.0 
The  values  in  Table  III  were  obtained  by  the  injection  of  digi- 
talis alone  (c.f.  Table  II).  A.  represents  a  tincture  obtained  from 
leaf  ground  for  percolation  by  Gilpin.  Langdon  &  Co..  in  Oct..  1906. 
B.  was  from  a  specimen  obtained  from  the  same  firm  in  April,  1910, 
and  was  said  to  have  been  obtained  as  recentlv  as  possible.  D.  was 
from  an  English  leaf  obtained  at  the  same  time  as  the  German  just 
