18 Nebraska Agricultural Exp. Station. Research Bui. 21 
the graph in Table 26, which tends to show that the small 
degree of protection conferred by the serum has practically dis- 
appeared after a lapse of seven or eight days. 
Table 24. 
Results of virus inoculations of serum-treated rabbits after rang- 
ing periods. 
Serum-treated 
Virus-control 
rabbits 
rabbits 
Alive 
Dead 
Alive 
Dead 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
0 
2 
1 
0 
1 
0 
0 
3 
0 
2 
0 
2 
0 
2 
0 
3 
0 
2 
0 
3 
0 
2 
0 
2 
0 
1 
0 
3 
0 
1 
1 
2 
0 
2 
0 
3 
0 
2 
1 
2 
0 
1 
0 
3 
0 
1 
0 
3 
0 
2 
0 
3 
0 
2 
1 0 
3 
0 
1 
0 
3 
0 
1 
0 
3 
0 
2 
0 
3 
0 
2 
0 
3 
1 
0 
0 
3 
0 
1 
0 
3 
0 
2 
0 
3 
0 
2 
0 
3 
0 
1 
0 
3 
0 
1 
Injection 
of 10 c.c. 
of serum 
No. 
Virus 
injection 
after serum. 
Days 
Remarks 
1052 
1440 
1522 
1178 
1434 
1828 
1829 
1830 
1 
4 
8 
11 
14 
3 
7 
11 
15 
18 
7 
11 
4 
8 
12 
16 
4 
8 
12 
16 
4 
8 
12 
16 
4 
8 
12 
16 
4 
8 
12 
16 
