27 
T able showing the results of injecting 6 c.c. of antitoxic horse serum (Natl. IX. 17) into the 
■ 'peritoneal cavity of guinea pigs treated from 25 to 35 days prior with 2 i 0 c. c. of the blood 
serum of other animals. 
No. of 
guinea 
Pig- 
171 
172 
174 
167 
168 
169 
170 
176 
191 
192 
193 
214 
215 
212 
185 
186 
1S2 
184 
196 
197 
206 
207 
210 
201 
202 
Rabbit. 
do . 
do . 
Rat 
do . 
do . 
do . 
Donkey 
Cat 
do. . 
do.. 
Dog 
do.. 
do.. 
Hog... . 
do.. 
Sheep . . 
do.. 
Chicken 
do.. 
Cattle . . 
do.. 
do. . 
Han 
do. . 
Previous treatment. 
Kind of serum. 
— $ — 
Days 
prior. 
Result. 
O C.C.. 
25 
No symptoms. 
do 
34 
Do. 
do 
34 
Symptoms, recovered. 
do 
25 
No symptoms. 
do.... 
34 
Do. 
do 
34 
Do. 
do 
34 
Do. 
do 
25 
Do. 
do 
25 
Do. 
do 
34 
Symptoms, recovered. 
do 
34 
Symptoms (?), recovered. 
do 
26 
No symptoms. 
do 
35 
Do. 
do 
35 
Symptoms, recovered. 
do 
30 
No symptoms. 
do 
30 
Symptoms, recovered. 
do 
30 
Do. 
do 
30 
No symptoms. 
do 
26 
Symptoms, recovered. 
do 
26 
Do. 
do 
31 
No symptoms. 
do 
31 
Do. 
do 
31 
Do. 
do 
31 
Symptoms, recovered. 
.do 
31 
No symptoms. 
As the above series of guinea pigs was tested with antitoxic horse 
serum, we tested another series, similarly sensitize^, with normal 
horse serum, as shown in the table on the following page, the results 
in all respects being similar. 
