CAPACITY FOR HEAT OF METALS AT LOW TEMPERATURES. 
341 
Table XY. 
Column I.—Absolute temperature. 
Column II.—Atomic heat C p , from the smoothed curves. 
Column III.—Difference between the atomic heat when the metal is free to expand 
and the hypothetical value at constant volume. 
For Al, Cu, Ag, and Pb the values deduced from equation (5) are given under (l) 
and those from equation (6) under (2). 
I. 
II. 
III. 
I. 
II. 
III. 
I. 
II. 
III. 
T. 
c p . 
Qp- 
-c„. 
T. 
Cp. 
Cp- 
-c u . 
T. 
c 2 . 
Cp- 
-c„. 
(4 
CO 
(4 
(2-) 
(4 
(2.) 
Alum 
inium. 
o 
32-4 
0*25 
120 
3-74 
0-05 
0-05 
o 
300 
5-81 
0-24 
0'21 
35-1 
0-33 
160 
4-64 
0-08 
0-08 
320 
5-90 
0-26 
0'23 
50 
0-91 
200 
5-14 
0-12 
0-11 
340 
5-98 
0-29 
0'26 
80 
2-27 
o-oi 
o-oi 
230 
5-40 
0-15 
0-14 
360 
6'05 
0-31 
0-28 
100 
3-08 
0-03 
0-03 
250 
5-54 
0-17 
0-16 
380 
6'13 
0-34 
0'30 
Iron. 
o 
50 
0-98 
° 
170 
4-85 
o- 
03 
0 
290 
5-98 
o- 
09 
70 
1-86 
190 
5-13 
o- 
04 
310 
6-09 
o- 
10 
90 
2 “74 
210 
5-36 
o- 
04 
330 
6-19 
O' 
12 
110 
3-47 
o- 
01 
. 230 
5-54 
o- 
06 
350 
6-28 
o- 
13 
130 
4-05 
o- 
01 
250 
5-70 
o- 
07 
370 
6-35 
O' 
15 
150 
4-50 
o- 
02 
270 
5-85 
o- 
08 
390 
6'41 
o- 
17 
Copper. 
0 
23-5 
0-22 
150 
5'05 
0'04 
0-06 
o 
290 
5-83 
0-15 
0'14 
27-7 
0-32 
170 
5-23 
0-06 
0-07 
310 
5'89 
0-16 
0-15 
50 
1-32 
190 
5 - 37 
0-07 
0-08 
330 
5'95 
0-18 
0-16 
70 
2-43 
o-oi 
210 
5-50 
0-08 
0-09 
350 
5'99 
0-20 
0-17 
90 
3-48 
0-02 
230 
5-61 
0-10 
010 
370 
6'04 
0'22 
0-18 
110 
4-31 
0-02 
0-03 
250 
5-70 
0-11 
0-11 
390 
6'09 
0'23 
0-19 
130 
4-78 
0-03 
0-05 
270 
5-77 
0-13 
O'13 
Zinc. 
o 
30 
0-94 
0 
160 
5-61 
o- 
09 
o 
290 
6-05 
o- 
23 
50 
2-54 
190 
5-75 
o- 
12 
310 
6-10 
O' 
25 
80 
4-09 
o- 
01 
210 
5-82 
o- 
14 
330 
6-15 
o- 
28 
100 
4-72 
o- 
03 
230 
5-88 
o- 
16 
350 
6'19 
O' 
30 
120 
5-15 
o- 
05 
250 
5-95 
o- 
18 
370 
6'22 
O' 
33 
140 
5-44 
o- 
07 
270 
5-99 
o- 
20 
390 
6-25 
O' 
36 
