15 
G. P. No. 4526. Six c. c. antitoxic horse serum (National VIII. 17) were injected into the 
peritoneal cavity. Death in 30 minutes. 
[Previous treatment: 17 days prior, inoculated subcutaneously with 0.19 c. c. of toxine 
No. 7+1 unit antitoxic horse serum (Standard B27).] 
Immediately after death the phrenic nerve was exposed and stimu- 
lated high up, causing contractions of the diaphragm both upon mak- 
ing and breaking the galvanic current. The contractions were also 
caused with the induced current. The contractions of the diaphragm 
caused by stimulating the phrenic nerve in this way were produced 
with a weaker current than those required to cause similar contrac- 
tions in a normal control guinea pig. 
