158 
MESSRS. W. H. HOWELL AND F. DONALDSON 
Table showing the influence of the rate of beat on the work done by the heart. 
May 18, 1882.—Weight of Dog, 7005 grms. Weight of heart, 59'5 grms. 
Thermometer in the inflow tube and in the left subclavian artery. 
r 
Observations. 
1 
-2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
Time. 
h. m. 
1 30 
1 32 
1 36 
1 39 
1 42 
1 44 
1 46 
1 47 
1 48 
1 51 
1 52 
1 54 
1 57 
1 59 
2 02 
2 04 
2 07 
2 08 
Temp. C. 
/A. 38 + 1 
\Y. 38 + / 
/ A. 38-25 \ 
1V. 38-25/ 
A. 36 + 1 
Y. 36 - / 
A. 34 + 1 
Y. 34 - / 
f A. 33 1 
\Y. 32-25/ 
/A. 31-75 1 
l Y. 31 — / 
/ A. 31 + 1 
1 Y. 30 J 
\ A. 30-5 
1 Y. 29-75 
/ A. 30-25 
l Y. 29-75 
A. 29-5 
Y. 27-75 
A. 28-5 1 
Y.27-5 / 
A. 28-5 
Y.27-5 
A. 27-75 
Y.27 
A. 26-5 
Y. 25 - 
A. 28 
Y.28-5 
f A. 26-5 1 
1 Y.25 - / 
{ 
/ A. 28-751 
\ Y. 29 / 
' .31-751 
.33 / 
.32-5 1 
.33-5 / 
Beats in 
30 seconds. 
Arterial 
pressure. 
Millims. of 
mercury. 
V enous 
pressure. 
Centims. of 
blood. 
Outflow in 
30 seconds. 
Cub. centims. 
Outflow in 
1 beat. 
Cub. centims. 
114 
100 
20 
325 
2-85 
113-5 
100 
20 
315 
2-78 
101 
100 
20 
283 
2-80 
90-5 
100 
20 
275 
3-04 
79 
98 
20 
260 
3-29 
70 
98 
20 
250 
357 
66-5 
97 
20 
240 
3-61 
62-25 
97 
20 
220 
3-53 
60-5 
97 
20 
208 
3-44 
55-75 
96 
20 
208 
3-73 
49-5 
96 
20 
200 
4-04 
49-75 
96 
20 
193 
3-88 
43-5 
94 (?) 
20 
185 
4-25 
38-5 
90 (?) 
20 
180 
4-68 
44 
95 
20 
184 
4-18 
47 
96 
20 
192 
4-09 
64-5 
96 
20 
230 
3-56 
70'75 
97 
20 
255 
3-60 
