684 
PROFESSOR H. N. MARTIN ON THE INFLUENCE OF VARIATIONS 
Experiment V. 
May 22, 1882.— Dog weighed 5605 gnus. Chloroform administered while tire heart 
was being isolated. Venous pressure at first that due to a column of defibrinated 
Calf’s blood 10 centims. in height, then doubled. Temperatures taken both in inflow 
tube (by thermometer p, Plate 48, fig. 1) and in the aortic arch by a cannula thrust down 
the left subclavian artery. Heart isolated at l h 30 ra p.m. The mean temperature given in 
the sixth column is obtained by adding together the inflow and outflow temperatures 
and dividing by 2. It does not really represent the mean temperature of the heart, 
as while the inflow temperature is that of the blood in right auricle and ventricle, and 
the outflow (aortic) temperature that in left auricle and ventricle, the latter is also 
the temperature of the blood circulating in the walls of the heart itself. 
Number 
of 
observa¬ 
tion. 
Time, p.m. 
Carotid 
pressure in 
milliins. of 
Hg. 
Inflow 
temperature. 
Outflow 
(aortic) 
temperature. 
Mean 
temperature. 
Pulse-rate 
per minute. 
Remarks. 
li. m. 
1 
1 
55 
94 
36-3 
36'5 
36-4 
227 
Venous pressure 10 
2 
2 00 
94 
37-3 
37-3 
37-3 
234 
centims. 
3 
2 05 
94 
37-3 
37'5 
37-4 
238 
4 
2 10 
94 
37-5 
367 
377 
225 
5 
2 12 
93 
385 
37-5 
38-0 
231 
6 
2 
14 
96 
39-5 
39-0 
39-2 
249 
Venous pressure raised 
7 
2 
16 
96 
38-0 
38-5 
38-2 
244-5 
to 20 centims. 
8 
2 18 
96 
38-5 
38-3 
38-4 
238-5 
9 
2 
20 
97 
39'0 
387 
38-8 
241 
10 
2 
23 
94 
39T 
39-0 
39-0 
244 
11 
2 
25 
94 
40-3 
397 
40-0 
249 
12 
2 
27 
95 
40-7 
407 
40'4 
252 
13 
2 30 
97 
40-0 
39-9 
39-9 
252 
14 
2 33 
92 
40-0 
397 
39-8 
243 
15 
2 
35 
92 
40-0 
39-5 
397 
233 
16 
2 38 
52 
(?) 
(?) 
102 
Pulse very suddenly 
slowed and became 
somewhat irregular 
and experiment dis¬ 
continued. 
