66 
Series VII. 
In this series the comparative physiological activity of two sam- 
ples of a commercial preparation, Thyraden, was determined; the 
results with a sample of desiccated sheep thyroid containing very 
nearly the same percentage of iodine are introduced for the sake of 
comparison. 
A. THYRADEN (A); 0.085 PER CENT IODINE. 
Date. 
Weight of 
mouse. 
Remarks. 
1908. 
July 3 
15.87 
9 
14.43 
11 
13.57 
12 
July 3 
16.05 
9 
14.10 
11 
14.00 
12 
Julv 3 
14.89 
9 
13.50 
11 :_i 
13.33 
12 
July 3 
13.42 
9 
10.41 
11 
9.85 
Feeding of cakes each containing 0.001 gm. thyraden commenced. 
Acetonitrile, 8.14 mgms., i. e., 0.6 mgm. per gm. mouse. Survived. 
Thyraden as above. 
Acetonitrile, 9.24 mgms., i. e., 0.66 mgm. per gm. mouse. Survived. 
Thyraden as above. 
Acetonitrile, 10 mgms., i. e., 0.75 mgm. per gm. mouse. Died 1§ hours. 
Thyraden as above. 
Acetonitrile, 9.85 mgms., i. e., 1 mgm. per gm. mouse. Died If hours. 
B. THYRADEN (B); 0-.085 PER CENT IODINE. 
19 08. 
Julv 3 
9 
11 
12 
15. 38 
14.28 
14 44 
Feeding of cakes each containing 0.001 gm. thyraden commenced. 
1 Acetonitrile, 6.50 mgms., i. e.. 0.45 mgm. per gm. mouse. Survived. 
Julv 3 
9 
- ii ! 
12 
11.37 ! 
10. 97 
10.60 
Thyraden as above. 
Acetonitrile, 5.30 mgms., i. e., 0.5 mgm. per gm. mouse. Survived. 
Thyraden as above. 
Julv 3 
15.00 
9 
13.98 
11... 
12.21 | 
. 
12 
i Acetonitrile, 6.72 mgms., i. e., 0.55 mgm. per gm. mouse. Died 2| hours. 
July 3 
9 
15.83 i 
15.20 1 
1 Thyraden as above. 
11 
15.65 
! Acetonitrile, 10.96 mgms., i. e., 0.7 mgm. per gm. mouse. Died 2 \ hours. 
