62 
TRANSACTIONS OF THE TEXAS ACADEMY OF SCIENCE. 
the arterial pressure. A little over two minutes, when the pressure 
marked 80 mm. (normal 150 mm.), the cardiac beats had increased from 
the normal rate, 69, to 90. The pulse became then very irregular, but 
soon assumed a steadier character. Three minutes later, or a little over 
six minutes after the injection, both the pulse and pressure had regained 
their normal standard in rate and height respectively. The respiration, 
though it was not recorded on the cylinder, gave practically the same 
results as had been obtained in the last experiment. 
The animal used for Experiment XV weighed 6.804 kilos, the changes 
observed in this instance resembling those noticed in experiment XIII in 
regard to the blood pressure. Soon after the first injection of 0.01 
Experiment XIV (Xorrnal). 
Time. 
Dose. 
Pressure 
Pulse. 
Remarks. 
(Dog-weight 5.14 kUos.) 
m. s. 
grammes. 
m.m. 
p. m. 
0.00 
. 
150 
69 
1.00 
0.05 
150 
69 
Injection begun. 
1.30 
148 
66 
Injection ended. 
2.10 
. 
100 
78 
2.50 
80 
90 
3.50 
40 
Pulse very irregular. 
4.50 
140 
66 
7.50 
. 
150 
6S 
Animal was afterwards killed wdth ether. 
Experiment XV (Xorrnal). 
Time. 
Dose. 
Pressure 
Pulse. 
Respira¬ 
tion. 
Remarks. 
(Dog-weight 6.804 kilos. 
m. s. 
grammes. 
m.m. 
p. m. 
p. m. 
0.00 
140 
165 
32 
1.30 
0.01 
140 
165 
32 
Injection begun. 
2.00 
166 
165 
30 
Injection ended. 
3.00 
0.02 
166 
153 
33 
Injection begun. 
3.30 
160 
13S 
21 
Injection ended. 
4.30 
0.02 
166 
138 
18 
Injection begun. 
5.00 
166 
138 
18 
Injection ended: convulsions. 
16.30 
0.03 
136 
153 
33 
Injection begun. 
17.00 
136 
129 
45 
Injection ended; pulse waves large 
(22 m.m.) 
18.00 
130 
116 
45 
19.30 
128 
112 
45 
gramme, from 140 mm. the column of mercury rose to 166 mm. It soon 
fell to 160, still above the normal, and was again seen at 166 about one 
and a half minutes after a second dose of 0.02 gramme of the agent. 
Convulsions appeared half a minute later, these lasting but for a few 
moments. The pressure continued high but was soon brought down by 
a third injection of 0.02 gramme, and especially after a fourth dose of 
