13 
G. P. No. 4509. Six c. c. antitoxic horse serum (Natl. VIII. 17) injected into the peritoneal 
cavity. Symptoms; recovered. 
[Previous treatment: 25 days prior, inoculated subcutaneously with 0.19 c. c. toxine 
No. 7+1 unit antitoxic horse serum (Standard B27).] 
G. P. No. 143. Six c. c. antitoxic horse serum (Natl. IX. 17) injected into the peritoneal 
cavity. Dead in 35 minutes. 
[Previous treatment: 42 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+ 3 + c. c. antitoxic horse serum (Stearns 1351).] 
G. P. No. 73. Six c. c. antitoxic horse serum (Natl. VIII. IS) injected into the peritoneal 
cavity. Symptoms; recovered. 
[Previous treatment: 57 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+250 units antitoxic horse serum (Natl. IX. 17).] 
G. P. No. .82. Six c. c. antitoxic horse serum (Natl. VIII. 18) injected into the peritoneal 
cavity. Symptoms; recovered. 
[Previous treatment: 57 days prior, inoculated subcutaneously with 0.006 c. c. toxine 
No. 7 + 2 + c. c. antitoxic horse serum (Natl. IX. 17).] 
G. P. No. 139. Six c. c. antitoxic horse serum (Natl. VIII. 18) injected into the peritoneal 
cavity. Dead in 15 minutes. 
[Previous treatment: 49 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7+3 + c. c. antitoxic horse serum (Stearns 1351).] 
All of the above pigs were first given the toxine-antitoxin mix- 
tures in order to test the strength of diphtheria antitoxic serum bought 
on the open market in accordance with the law of July 1 , 1902. 
Horse serum is also toxic when injected subcutaneously and in 
small quantities, as will be seen from the following experiments: 
G. P. No. 4951. Six c. c. normal horse serum (roan) inoculated subcutaneously. Dead in 
35 minutes. 
[Previous treatment: 40 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+ 3 + c. c. antitoxic horse serum (NYBH 10B).] 
G. P. No. 5047. Same injection. Dead in 40 minutes. 
[Previous treatment : 51 days prior, inoculated subcutaneous^ with 0.22 c. c. toxine 
No. 7 + 4 + c. c. antitoxic horse serum (Alex. A205).] 
G. P. No. 4950. Same injection. Symptoms; recovered. 
[Previous treatment: 40 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5+-g+ c. c. antitoxic horse serum (NYBH 10B).] 
G. P. No. 5046. Same injection. Dead in 40 minutes. 
[Previous treatment : 51 days prior, inoculated subcutaneously with 0.22 c. c. toxine 
No. 7 + 4 + c. c. antitoxic horse serum (Alex. A204).] 
G. P. No. 4524. Six c. c. antitoxic horse serum (Natl. VIII. 17) inoculated subcutane- 
ously. Symptoms; recovered. 
[Previous treatment: 28 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5 + 3 + c. c. antitoxic horse serum (Alex. 192).] 
G. P. No. 4623. One c. c. antitoxic horse serum (Natl. VIII. 17) inoculated subcutane- 
ously. Symptoms; recovered. 
[Previous treatment: 28 days prior, inoculated subcutaneously with 0.139 c. c. toxine 
No. 5 + 3 + 0 . c. antitoxic horse serum (Alex. 192).] 
G. P. No. 4512. One c. c. antitoxic horse serum (Natl. VIII. 17) inoculated subcutane- 
ously. Dead in 81 minutes. 
[Previous treatment: 42 days prior, inoculated subcutaneous^ with 0.19 c. c. toxine 
No. 7+1 unit antitoxic horse serum (Standard B27).] 
