194 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
with ether and after tracheotomy had been performed a mercury 
manometer was connected with the carotid artery. After the 
blood pressure was recorded on a kymograph the right femoral vein 
was exposed and 1 c.c. of infusion No. 9 (P. venenosus) diluted with 
4 с.с. of .8 per cent saline solution was injected with a hypodermic 
needle. The fluid was allowed to flow into the vein by force of 
gravity. Shortly after the injection there was a slight increase 
of the blood pressure approximating 2 mm. which lasted three 
minutes and then became normal. The number of heart-beats 
prior to the injection was 131 per minute, and in less than a minute 
after the injection the heart-beat increased to 165. Fifteen minutes 
later 5 c.c. of infusion No. 11 (P.venenosus) was injected into the 
same vein in the same way as described above. The injection 
was followed by a gradual increase until a pressure of 2 mm. above 
normal was recorded. The pulse rate remained unchanged. 
Twenty-two minutes later (3:00 P.M.) 5 c.c. of infusion No. 10 
(P. retirugis) was injected into the left femoral vein and in three 
seconds the blood pressure dropped gradually 14.5 mm. below the 
normal and then slowly increased to 11 mm. above the normal, 
from which point it slowly diminished until a point below the 
normal was attained from which there were but slight deviations. 
The pulse rate immediately before the injection was 144 per minute 
and after the injection increased to 165-170. At 3:09 P.M. an- 
other injection of 5 c.c. of infusion No. 10 (P. retirugis) was given 
through the same vein. This time there was only a decrease in 
the blood pressure and as in the preceding cases this was followed 
by an increase which was very slight in proportion to the decrease. 
The return to normal required a little over 10 minutes. This 
experiment was followed at 3:17 P.M. by an injection of 3 c.c. of 
infusion No. 11 (Р. venenosus), and a record was obtained similar 
to that of the preceding case. The pulse rate was 169 per minute. 
Six minutes later an injection of 3 c.c. of .8 per cent physiological 
salt solution was introduced through the same vein. No change 
in the blood pressure or in the pulse rate occurred. After the first 
injection it was noted that there was a gradual decline in the 
blood pressure. The rate of respiration was not increased and a 
uniform count of 19 per minute was made. These results do not 
agree with those described above for rabbit and guinea pigs. 
