232 C. J. MARTIN. 
ae 
Experiment 24—Rabbit, weight 1:8 kilos.; ether during 
operation. Venom solution heated to 85° C. previous to injection — 
Time. Blood pressure| - 
in mm. 0: Remarks. le 
hrs. mins. secs. mercury. 
Normal 102 "01 gramme per kilo. injected into bo he 
vein. Injection lasted 3 minutes 
OS. 82 
0.54" 80 
OG. 6 0 79 2 atc doubled in rate and extent. 
0 6 0 44 j 
A ae 36 . 
Go BO 40 respiration diminishin ng. ‘ 
a: 9 6 33 ee cence : but greater than : 
r 
0 10 0 56 | convulsi : 
eee 8 eae 12 long cae csaviie respiration. 4 
0 12 0 8 | dead. 4 
In this experiment when the pressure had fallen to 33 mmy 
asphyxial convulsions occurred, although the respiration at the ; 
time was above the normal, both in rate and extent. 
Observations on the blood pressure after subcutaneous injection of E 
the poison. 
When the poison is subcutaneously introduced, the effect aon 
the blood pressure is complicated by the results of simultaneous 4 
paralysis of the respiration, to a much greater extent than under i 
the previous experimental conditions. The cause of this differ: 
ence will be discussed in the section devoted to the consideration 
of the effects of the venom on the respiratory mechanism, but it 
is necessary to mention the fact now. Blood pressure records 
taken from an animal into which the poison has been subeutane : 
ously injected exhibit the effects of the primary asph 
Seon of the vagus and — centres, and the 2 
necessary to eliminate these secondary results due to its 0 
at the same time upon the respiratory mechanism, by 
