152 
MESSRS. W. H. HOWELL AND E. DONALDSON 
Table showing the effect of variations of venous pressure on the work done by the 
heart. 
April 4, 1882.—AVeight of Dog, 5891 grms. Weight of heart, 5T5 grms. 
Work done at each 
systole of the left 
ventricle, in gramme 
Venous 
metres. 
Arterial 
pressure in 
Outflow in 
Outflow in 
Observa- 
Temp. C. 
Beats in 
pressure in 
superior 
30 seconds. 
1 beat. 
tions. 
Time. 
in superior 
30 seconds. 
carotid. 
cava. 
Cub. 
Cub. 
With 
With 
cava. 
Miilims. of 
Centims. of 
centims. 
centims. 
arterial 
arterial 
mercury. 
blood. 
pressure 
pressure 
actually 
= 100 
observed. 
miilims. 
1 
h. 
2 
IB. 
56 
o 
38 
116-5 
88 
10 
255 
2-19 
2-60 
2-96 
2 
2 
58 
38 + 
120 
92 
15 
333 
2-77 
3-44 
3-74 
3 
2 
59 
38 
120 
96 
20 
404 
3-37 
4-37 
4-55 
4 
3 
00 
38 + 
120 
100 
25 
489 
4-08 
5 - 50 
5 50 
5 
3 
01 
38 
116 
106 
30 
582 
5-02 
7-17 
6-78 
6 
3 
03 
37 
116 
no 
36-8 
629 
5-42 
8-04 
7-32 
7 
3 
06 
113 
107 
35 
610 
5-40 
7-80 
7-29 
8 
3 
09 
36-5 
106 
88 
10 
230 
2-17 
2-58 
2-93 
9 
3 
11 
36‘5 
105-5 
92 
15 
299 
2-83 
3-51 
3-82 
10 
3 
12 
36 
104 
100 
20 
381 
3-66 
4-93 
4-94 
11 
3 
13 
36 
103-5 
100 
25 
460 
4* 4r4 
5-99 
5-99 
12 
3 
15 
36 
101-5 
102 
30 
506 
4-99 
6-87 
6-74 
13 
3 
16 
36- 
101-5 
107 
35 
572 
5-63 
8-13 
7-60 
14 
3 
17 
36- 
99-5 
109 
36-8 
576 
5-79 
8-52 
7 82 
15 
3 
20 
35-5 
99-75 
88 
10 
175 
1-75 
2-08 
2-36 
April 13, 1882.—Weight of Dog, 8125 grms. Weight of heart, 92 grms. 
Arterial 
Venous 
pressure in 
Outflow in 
Outflow in 
Work done at each 
systole of the left 
ventricle, in gramme - 
metres. 
Observa¬ 
tions. 
Time. 
Temp. C. 
in superior 
cava. 
Beats in 
30 seconds. 
pressure in 
carotid. 
Miilims. of 
mercury. 
superior 
cava. 
Centims. of 
blood. 
30 seconds. 
Cub. 
centims. 
1 beat. 
Cub. 
centims. 
With 
arterial 
pressure 
actually 
observed. 
With 
arterial 
pressure 
= 100 
miilims. 
1 
h. m. 
1 40 
36 — 
94-5 
105 
10 
220 
2-33 
3-30 
3-15 
2 
1 41 
36- 
89 
112 
20 
400 
4-49 
6-78 
6-06 
3 
1 43 
36 
92 
121 
30 
535 
5-81 
9-48 
7-84 
4 
1 44 
36- 
92 
125 
35 
618 
6-71 
11-30 
9-06 
5 
34-5 
89-5 
129 
40 
680 
7-59 
13-21 
10-25 
6 
34-5 
89-5 
131 
45 
690 
7-71 
13-63 
10-41 
7 
34-25 
86"5 
135 
50 
750 
8-67 
15-79 
11-70 
8 
35'75 
93 
131-5 
58 
700 
7"53 
13-35 
10-17 
9 
35- 
93 
105 
10 
202 
217 
3-08 
2-93 
