Immunity Against Hemorrhagic Septicemia 
33 
Table 44. 
1922 No. 1946 
Rabbit 
No. 
Injection 
of serum 
No. 1946, 
March 13, 
10 c.c. 
Ii 
ljecti 
IS 
1/1C 
ons o 
\o. 59 
>,000 
1 vin 
i j 
c.c. 
is 
Dates 
of 
deaths 
Remarks 
3/17 
3/21 
3/25 
3/29 
3/31 
4/4 
4/8 
1 
+' 
+ 
— . 
— 
. — . 
+ 
— 
— 
April 1 
2 
+ 
+ 
— 
— 
— 
+ 
— 
— 
April 1 
3 
+ 
+ 
— 
— 
— 
+ 
— 
— 
April 1 
4 
4- 
— 
- — 
— 
— 
— 
— 
Mar. 18 
5 
— 
+ 
Mar. 19 
6 
+ 
+ 
— 
— 
— 
— 
— 
Mar. 22 
7 
+ 
— 
+ 
— 
— 
— - 
+ 
— 
8 
+ 
— 
+ 
— 
— 
— 
— ■ 
— 
Mar. 23 
9 
— . 
+ 
— ^ 
— 
— 
— 
— 
Mar. 22 
10 
— 
— 
+ 
— 
— 
— 
— 
— - 
Mar. 22 
11 
+ 
— 
+ 
— 
— 
— 
— 
Mar. 26 
12 
+ 
— 
— 
+ 
— ■ 
— 
— 
— 
Mar. 26 
13 
• + 
— 
— 
+ 
— 
— 
— 
— 
Mar. 26 
14 
— 
— 
+ 
— 
— - 
— 
+ 
April 9 
15 
— 
— 
— 
+ 
— 
— 
— 
— 
Mar. 26 
16 
+ 
— 
— 
— 
+ 
— 
— 
— 
Mar. 30 
17 
+ 
— 
— 
— 
+ 
— 
— 
— 
Mar. 30 
18 
+ 
— 
— 
— 
+ 
— 
- — 
— 
Mar. 30 
19 
— 
— 
— 
— 
+ 
— 
— 
— 
Mar. 30 
20 
— 
— 
— 
+ 
— 
- — 
— 
Mar. 30 
21 

— 
— 
— 
+ 
— 
— 
Mar. 31 
22 
23 
— 
— 
— 
— 
— 
+ 
+ 
— 
April 1 
24 
— 
— 
— 
— 
— 
— 
+ 
— 
April 11 
25 
— 
+ 
April 9 
26 
- 
+ 
April 9 
The general results of the tests exhibited in the preceding 
tables are shown in Tables 45 and 46. 
It is manifest that in some of the sera examined a striking 
protective quality is present, but it is also manifest that even in 
the most potent specimens the passive immunity conferred is of 
but short duration and that as a rule it has vanished within a 
week. The influence of the serum is further shown by the 
lengths of the surviving periods of the animals. It will be 
observed that as the intervals between serum and virus inocula- 
tions lengthen there is a corresponding shortening of the sur- 
viving periods. The behavior of the surviving periods is fur- 
ther shown by the graph exhibited in Table 47. 
