OF THE BARK OF ERYTHROPHLEUM GUINENSE. 
645 
Time. 
Blood- 
pressure. 
_ 
1 
Oscilla- 
tions. 
Pulse in 
10 sec. 
m. B . 
millims. 
millims. 
1 0 
Normal curve taken 1 minute after connexion of 
cannula. Oscillation at top of respiratory curve 
80 
j i\ 
23 
2 15 
R. vagus ligatured and cut. 
1 9/ 
2 18 
L. vagus do. do. 
rioo 
\110 
60 
2 
40 
4 40 
18 
15 
55 
12 
12 
8 10 
Condition subsequent to irritation 
It was thus ascertained that irritation of the strength 
110 
1 
42 
of coil 5° was almost sufficient to stop the heart’s 
action when applied to the peripheral end of either 
vagus previous to injection of casca. 
.8 101 
3| cub. centims. of casca solution injected gradually 
9 12 J 
into vein. 
10 0 
120 
2 
40 
11 0 
12 0 
A clot formed. 
4 
43 
115 
(Slight improvement of pulse.) 
35 
12 35 
Peripheral end of L. vagus irritated. Coil 5° 
90 
8 
13 0 
Peripheral end of R. vagus irritated. Coil 5° 
95 
8 
35 
Condition between irritations . 
120 
2 
35 
14 27 
Left vagus. Coil 0° 
88 
5 
27 
Right vagus, do 
110 
0 
0 
15 20 
Complete stoppage of heart’s action without fall of 
blood-pressure. 
Experiment repeated with R. vagus. Coil 0° 
5 
26 
85 
17 101 
17 44 J 
Fresh injection of 4 cub. centims. 
18 30 
Condition after injection 
115 
2 
40 
19 5 
Right vagus. Coil 0°. Commencement of irritation 
100 
3 
30 
Latter part „ 
118 
2 
36 
19 30 
Left vagus. do. Commencement „ 
104 
4 
30 
Latter part „ 
120 
2 
35 
20 0 
Left vagus. do. Commencement „ 
121 
2 
35 
Latter part „ 
150 
2 
35 
20 30 
Condition after irritation 
120 
2 
40 
22 01 
22 25/ 
A third injection of 2 cub. centims. was given. 
24 25 
And the central ends of the vagi exposed for irritation. 
24 30 
Condition before irritation 
120 
2 
40 
25 12 
Central end of left vagus irritated. Coil 0° 
130 
1? 
30 
(Blood-pressure increased ; pulse nearly extinguished.) 
25 50 
Condition after irritation 
125 
2 
34 
26 30 
Right vagus. Coil 0° 
130 
1 
34 
(Effect as before.) 
27 0 
Condition after irritation 
120 
2 
36 
28 16 
The sciatic nerve was exposed and irritated with 
coil 5° 
135 
2 
37 
28 45 
Condition after irritation 
120 
2 
36 
This experiment shows that when both vagi are divided the injection of a small dose 
of casca no longer slows the heart ; and therefore the slowing usually observed after 
* The mark 0 here signifies distance in centimetres between primary and secondary coils in Dir Bois Reymond’s 
in duction-apparatus . 
4 T 2 
