55 
Series II. 
The same thyroid preparations as above were used, but twice as 
much of the iodine poor as of the iodine rich was given. The experi- 
ments were performed upon a different lot of mice. 
A. SHEEP THYROID; 0.17 PER CENT IODINE. 
Date. 
Weight 
of mouse. 
Remarks. 
1907. 
December 5... 
16.00 
Feeding of cakes each containing 0.002 gm. thyroid begun. 
9... 
15. 67 
12... 
16.28 
14 | 
15.72 
15. .. 
15.80 
Acetonitrile, 33.18 mgms., i. e., 2.1 mgms. per gm. mouse. Survived. 
December 5... 
17.54 
Thyroid as above. 
9... 
18.06 
12... 
18. 13 
14... 
17. 91 
15... 
17. 57 
Acetonitrile, 40.41 mgms., i. e., 2.3 mgms. per gm. mouse. Survived. 
December 5... 
20.08 
Thyroid as above. 
9... 
21.20 
12...! 
20.92 
14... 
20.65 
Acetonitrile, 49.56 mgms., i. e., 2.4 mgms. per gm. mouse. Died 2 to 3 hours. 
December 5... 
15.37 
Thyroid as above. 
9... 
15. 16 
12... 
15.36 
M -| 
16. 31 
| 
Acetonitrile, 48.93 mgms., i. e., 3 mgms. per gm. mouse. Died 5| hours. 
B. SHEEP THYROID; 0.087 PER CENT IODINE. 
1907. 
December 5... 
14.00 
Feeding of cakes each containing 0.004 gm. thyroid begun. 
9. J 
14.92 
12.. .1 
14.42 
14... 
14.76 
15... 
14.05 
[ Acetonitrile, 28.1 mgms., i. e., 2 mgms. per gm. mouse. Survived. 
December 5... 
15. 17 
Thyroid as above. 
9... 
15.49 
12... 
15.37 
14... 
15.22 
15... 
14.28 
Acetonitrile, 32.84 mgms., i. e., 2.3 mgms. per gm. mouse. Survived. 
December 5... 
16. 41 
Thyroid as above. 
9... 
16.59 
12... 
16.46 
14... 
16.54 
15... 
16.30 
Acetonitrile, 40.75 mgms., i. e., 2.5 mgms. per gm. mouse. Died 2 hours. 
December 5... 
19.38 
Thyroid as above. 
9... 
20.86 
12... 
21.76 
14... 
21.46 
Acetonitrile, 60.09 mgms., i. e., 2.8 mgms. per gm. mouse. Died 3^ hours. 
