24 Nebraska Agricultural Exp. Station , Research Bui. 21 
Table 34. 
1922 No. 1946 
Rabbit 
No. 
Injection 
of serum 
No. 1946, 
March 13, 
c.c. 
Injection 
of virus 
No. 59, 
March 14, 
l/10,000c.c. 
Injection 
of virus 
No. 59, 
March 29, 
l/10,000c.c. 
Dates 
of 
deaths 
Remarks 
1 
5 
+ 
+ 
! Mar. 30 
2 
5 
4 
4 
Mar. 30 
3 
5 
4 
4 
; Mar. 30 
4 
10 
4 
4 

5 
10 
+ 
4 
Mar. 30 
6 
10 
4 
4 
Mar. 30 
7 
15 
4 
4 
Mar. 30 
8 
15 
4 
— 
Mar. 24 
9 
15 
4 
+ 
Mar. 30 
10 
— 
+ 
Mar. 16 
11 
— 
+ 
— 
Mar. 15 
12 
— 
— 
Mar. 15 
The results of the serum tests shown by Tables 27-34 are 
summarized and exhibited in Tables 35-30. It is shown that the 
variations in the doses were not followed by corresponding dif- 
ferences in the results obtained. It appears that the range be- 
tween 5 and 15 c.c. is not great enough to show the influence of 
quantity. The results also show a wide variation in the protec- 
tive qualities of the sera experimented with. In some the 
potency was good, in others it was scarcely above that of normal 
serum. Of the 48 rabbits used in this series, 25 were actually 
prevented from succumbing to the infection by the use of the 
serum. 
The influence of the serum is further shown by the longer 
surviving periods of the serum treated rabbits which succumbed 
as compared with those serving as controls or with those which 
received normal serum. 
