59 
Further, with equal amounts of the two thyroid preparations, that 
containing 0.192 per cent iodine protected against three times as much 
acetonitrile as did that containing but 0.061 per cent iodine. 
Series IV. 
A. SHEEP THYROID; 0.1 PER CENT IODINE. 
Date. 
Weight 
of mouse. 
Remarks. 
190S. 
January 15 
25. 65 
Feeding of cakes, each containing 0.001 gm. thyroid, commenced. 
18 
26.80 
21 
26.52 
24 
26.50 
26 
26.50 
Acetonitrile, 37.1 mgms., i. e., 1.4 mgms. per gm. mouse. Survived. 
January 15 
21.47 
Thvroid as above. 
18 
22. 05 
21 
21.36 
24 
20.00 
Acetonitrile, 30 mgms., i. e., 1.5 mgms. per gm. mouse. Survived. 
January 15 
27.50 
Thyroid as above. 
18 
27.88 
21 
27. 92 
24 
27.88 
25 
25. 50 
Acetonitrile, 43-35 mgms., i. e., 1.7 mgms. per gm. mouse. Died, 1| hours. 
January 15 
22.38 
Thyroid as above. 
18 
23.56 
21 
22.35 
24 
22. 22 
25 
22.02 
Acetonitrile, 44.04 mgms., i e., 2 mgms. per gm. mouse. Died, 2 hours. 
B. SHEEP THYROID; 0.19 PER CENT IODINE. 
1908. 
January 15 
27.74 
Feeding of cakes each containing 0.001 gm. thyroid commenced. 
18 
27.32 
21 
27.43 
24 
26.70 
Acetonitrile, 53.4 mgms., i. e., 2 mgms. per gm. mouse. Survived. 
January 15 
20.88 
Thyroid as above. 
18 
22.50 j 
21 
22.45 1 
24 
21.58 
25 ] 
21.90 
Acetonitrile, 54.75 mgms., i. e., 2.5 mgms. per gm. mouse. Survived. 
January 15 
19.30 
Thyroid as above. 
18 
19.42 
21 
18.58 , 
24 
18.58 
26 
19. 25 
Acetonitrile, 51.98 mgms., i. e., 2.7 mgms. per gm. mouse. Survived. 
January 15 
21.52 
Thyroid as above. 
18 
20. 91 
21 
21.22 : 
24 
20.69 
26 
20.93 
Acetonitrile, 62.79 mgms., i. e., 3 mgms. per gm. mouse. Died 1 hour. 
