548 Richards. — The Respiration of 
hastened by the freer access of the air to the tissues. The 
following table is calculated out from three of the experiments 
given in detail at the end of this paper. With the tem- 
perature and the ordinary pressure under which these experi- 
ments were carried out, i cc. of C0 2 may be called i-8 mg. 
in weight, while the same amount of 0 2 would be 1.3 mg., 
this being accurate within the limits of error of the methods 
employed and within the purposes of the table. In Experiments 
37 and 43, where determinations were made immediately 
after injury, the amount of 0 2 required for the C0 2 given off 
was not estimated for these two hours ; for, as has already been 
explained, the relation between the two gases is then not 
normal. The object of this table is twofold : both to bring 
more clearly before the eye the exact amount of the gases 
interchanged, and to show that this method coincides as to the 
production of C0 2 with the direct determinations made with 
Ba0 2 H 2 . Taking weight for weight, it will be seen that the 
two methods agree well as to the amount of C0 2 produced 
per hour. All the other experiments of the kind may be 
calculated out in a similar way from the data given. 
No. 
of 
Det. 
Duration 
of Expt. 
cc C 0 2 
produced. 
i 
1 
cc 0 2 
absorbed. 
mg. C 0 2 
produced. 
mg. 0 2 
absorbed. 
Amount in 
mg._0 2 
required 
theoretically 
for C 0 2 
produced. 
Amount in 
mg. 0 2 
absorbed 
not used in 
respiration. 
Expt. 36 
a 
2 hours 
2-2 7 
4- 9 2 
4 -TO 
6-40 
3-oo 
3*40 
8 potatoes 
b 
11-00 
II-72 
19-80 
I9.2O 
I4.40 
4-80 
195 grams 
c 
>> 
! 3-9 6 
i 8-45 
25-20 
24-00 
T 8*35 
5*65 
d 
y y 
15*74 
19-68 
28-30 
25-60 
20-60 
5*oo 
e 
yy 
I 2-6 I 
16-50 
22-70 
21-20 
16-50 
4 - 7 o 
Expt. 37 
a 
2 hours 
2*55 
5 * 6 i 
4-60 
7*30 
3*35 
3*95 
8 potatoes 
b 
yy 
ii *77 
10-20 
20-10 
13*30 
. . . 
. . . 
200 grams 
c 
yy 
9*33 
13*77 
16-80 
1 8-oo 
12-70 
6.30 
d 
yy 
i 3*°6 
16-36 
23.40 
21-20 
17.00 
4-20 
e 
yy 
11-48 
T 5*°5 
20-35 
I9.60 
14.40 
5*20 
Expt. 42 
a 
2 hours 
9-10 
00 
03 
M 
16-40 
16-70 
ii *95 
4*75 
2 carrots 
b 
yy 
I 9*^5 
20-33 
35 * 7 ° 
26-40 
• . . 
• • . 
1 65 grams 
c 
yy 
12.57 
19.26 
22 - 6 o 
2 5-00 
* 6-45 
8*55 
d 
yy 
19.80 
28-35 
35 * 6 ° 
36-80 
25.90 
10.90 
e 
yj 
25.68 
34*24 
46-20 
44 * 5 ° 
33 * 6 o 
10-90 
f 
yy 
i 5*78 
22-47 
28-40 
29-20 
20.70 
8-50 
