}  Stability  of  Digitalis  Leaf  Extracts. 
B.  Fluidextract  i.  No.  361 13  (D-1625)  5-10-17.  Alcohol  75 
per  cent. 
Date. 
M.  S.  D.,  Mils. 
Toxicity,  Per  Cent. 
Period  in  Months. 
May  11,  1917  
O.OOO476 
128 
Aug.  3.  1918  
O.OOI153 
52 
IS 
Sept.  5,  1918   
O.OO1260 
47-5 
16 
Oct.  13,  1918  
O.OOI260 
47-5 
17 
Dec.  15,  1918  
O.OOI260 
47-5 
19 
Apr.  1,  1919  
O.OO1333 
45- 
23 
Fluidextract  2.  No.  361 13  (D-1625)  as  marketed,  the  preceding 
sample  being  diluted.   Alcohol  75  per  cent. 
Date. 
M.  S.  D.,  Mils. 
Toxicity,  Per  Cent. 
Period  in  Months 
O.OO060 
IOO 
July  20,  1918  
O.OOI43 
42 
14 
Sept.  15,  1918  
O.OO160 
37-5 
16 
Nov.  3,  1918  
0.001 50 
40 
18 
O.OOI50 
40 
22 
Fluidextract  J.  No.  37799  (D-1625) — the  undiluted  fluidex- 
tract before  dilution  for  market.  Fat  free,  about  50  per  cent, 
alcohol. 
Date. 
M.  S.  D.,  Mils. 
Toxicity,  Per  Cent. 
Period  in  Months. 
Jan.  12,  1918  
0.000530 
113 
July  14,  1918  
0.000660 
91 
6. 
Aug.  6,  1918  
0.000807 
74 
7 
Sept.  s,  1918  
0. 001000 
60 
8 
Oct.  13,  1918  :  
0.001043 
57-5 
9 
Oct.  27,  1918  
0.001090 
55 
10 
Jan.  19,  1919  
0.001090 
55 
12 
Fluidextract  4.  No.  38459  (D-1625)  as  submitted  for  assay 
before  final  concentration.  ■ 
Date. 
M.  S.  D.,  Mils. 
Toxicity,  Per  Cent. 
Period  in  Months 
April  9,  1918  
O.OOO785  • 
76 
July  13,  1918  
0.000866 
70 
3 
0.000900 
66 
4 
Sept.  8,  1918  
O.001090 
55 
5 
Oct.  12,  1918  
0.001090 
55 
6 
O.OOIO90 
55 
7 
Jan.  5,  1919  
0.001090 
55 
10 
April  1,  1919  
O.001142 
52.5 
12 
