682 
PROFESSOR H. N. MARTIN ON THE INFLUENCE OF VARIATIONS 
Experiment III. 
May 3, 1882.—Dog weighed 6000 grins. Narcotised by subcutaneous injection of 
acetate of morphia before the operation of isolating the heart was commenced. 
Venous pressure at first that due to a column of whipped blood 10 centims. high, and 
afterwards to a column 15 centims. in height. Heart isolated at 12 h 55 m p.m. 
Number of 
observation. 
Time, p.m. 
Carotid pressure 
in millims. of Hg. 
Temperature. 
C.° in aortic 
thermometer. 
Pulse-rate 
per minute. 
Remarks. 
h. 
m. 
1 
1 
20 
110 
34-5 
15P5 
Venous pressure 10 centims. 
2 
1 
23 
110 
34-9 
162 
3 
1 
25 
110 
36T 
185 
4 
1 
27 
110 
36-1 
186 
5 
1 
29 
110 
37-9 
211 
6 
1 
30 
110 
39-3 
225 
7 
1 
31 
110 
40-0 
232-5 
8 
1 
33 
111 
40-5 
235 
9 
1 
35 
no 
40-3 
222 
10 
1 
38 
no 
38-5 
202-5 
11 
1 
41 
109 
37-0 
184-5 
Venous pressure raised to 15 
12 
1 
43 
no 
36-9 
195 
centims. between observations 
13 
1 
45 
no 
35-5 
168 
10 and 11. 
14 
1 
46 
112 
33-9 
152 
15 
1 
49 
no 
33-5 
156 
16 
1 
51 
no 
32-7 
142 
17 
1 
53 
no 
32-1 
129 
18 
1 
55 
in 
30-0 
102 
19 
1 
57 
in 
29-1 
94-5 
20 
1 
58 
no 
28-9 
87 
21 
1 
59 
96 
28-0 
67-5 
Heart weakens and ceases to 
22 
23 
2 
2 
06 
08 
42 
315 
63 
pump round before next 
observation. 
24 
2 
10 
Heart beat irregular and experi¬ 
ment discontinued. 
