22 
In order further to eliminate the antitoxin as a factor in this prob- 
lem, the following series of used or treated guinea pigs were injected 
with normal horse serum: 
G. P. No. 4100. Six c. c. normal horse serum (roan) injected into the peritoneal cavity. 
Dead in 15 minutes. 
[Previous treatment: 36 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+2To c - c - antitoxic horse serum (Alex. 190).] 
G. P. No. 4105. Same/njection. Dead in 30 minutes. 
[Previous treatment: 36 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+3+o c - c - antitoxic horse serum (Alex. 189).] 
G. P. No. 4106. Same injection. Dead in 5 minutes. 
[Previous treatment : 36 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+3+o c - c - antitoxic horse serum (Alex. 189).] 
G. P. No. 4331. Same injection. Dead in 90 minutes. 
[Previous treatment: 25 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+2+o c - c - antitoxic horse serum (Alex. 185).] 
G. P. No. 4351. Same injection. Dead in 40 minutes. 
[Previous treatment: 18 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+||+ c. c. antitoxic horse serum (PD&Co 08021).] 
G. P. No. 3950. Six c. c. normal horse serum (Sam) injected into peritoneal cavity. Dead 
in 10 minutes. 
[Previous treatment: 51 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+2+0^ c. c. antitoxic horse serum (Hubbert 1).] 
G. P. No. 3951. Six c. c. normal horse serum (Jane) injected into the peritoneal cavity. 
Dead in 30 minutes. 
[Previous treatment: 51 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+2+o c - c - antitoxic horse serum (Hubbert 1).] 
G. P. No. 3952. Six c. c. normal horse serum (Sp.) injected into the peritoneal cavity. 
Dead in 38 minutes. 
[Previous treatment: 51 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+2+o c - c - antitoxic horse serum (Hubbert 1).] 
G. P. No. 3953. Six c. c. normal donkey serum (No. 58) injected into the peritoneal cavity. 
Dead in 60 minutes. 
[Previous treatment: 51 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+3+j c. c. antitoxic horse serum (Hubbert 1).] 
G. P. No. 4109. One c. c. normal horse serum (roan) injected into the peritoneal cavity. 
Symptoms; recovered. 
[Previous treatment: 37 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+ 4 +o c - c - antitoxic horse serum (Alex. 188).] 
G. P. No. 4945. Six c. c. normal horse serum (roan) inoculated subcutaneously. Symp- 
toms; recovered. 
[Previous treatment : 34 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+^+0 c. c. antitoxic horse serum (Wellcome 478).] 
G. P. No. 4934. Six c. c. normal horse serum (roan) inoculated subcutaneously. Symp- 
toms; recovered. 
[Previous treatment: 34 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+3+o c - c - antitoxic horse serum (Wellcome 479).] 
G. P. No. 4930. Six c. c. normal horse serum (roan) inoculated subcutaneously. Symp- 
toms; recovered. 
[Previous treatment : 34 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+3+o c. c. antitoxic horse serum (Wellcome 475).] 
