144 
MEASUREMENT OF HIGH 
Table 34. — Constants of platinum a 
TEMPERATURES. [bull. 54 
loys. Digest — Continued. 
B 
1 
No. 
Metal alloyed 
to piatiuuin. 
Ao 
I 
(thick) 
St 
II 
(thin) 
St 
10 3 Xa 
II 
(thin) 
So 
10 3 xa 
(/'(0):/(0)JXl0 
•i 
I 
1 
51 
25 
26 
27 
44 
....do 
Chromium 
....do 
....do 
do 
19. 952 
20. 911 
20. 512 
20. 157 
20. 764 
21. 109 
20. 974 
20. 449 
20. 464 
20.724 
20. 807 
19. 433 
21. 263 
21.261 
21.302 
21. 180 
21. 241 
20. 753 
21. 179 
21.329 
20. 102 
20. 975 
(21.3) 
46.24 
28. 47 
41. 75 
42. 41 
32.06 
21.78 
25.97 
39.56 
24.68 
22.04 
26.11 
50.11 
16.79 
19.18 
17.61 
15.48 
17.68 
2a. 54 
16.04 
16.60 
47. 84 
24.75 
15.00 
49.91 
27.99 
41.39 
52.90 
31.71 
22. 21 
26.27 
40.35 
25.98 
21.88 
26.31 
49.25 
16.68 
19.67 
17.17 
15.37 
17.76 
30.14 
0.77 0.64 
1.14 1.06 
0.65 0.62 
0. 56 0. 49 
95 0. 87 
1. 55 1. 49 
1.27 1.20 
0.69 0.66 
1.32 
1.56 1.50 
1.28 1.14 
0.52 0.43 
2.13 1.94 
1.76 1.69 
2.06 1.88 
2.28 2.23 
2.02 1.82 
1.11 1.09 
49.16 
27.37 
40.87 
52.35 
31.09 
21.52 
25.60 
39. *6 
25.33 
21.18 
25.64 
48.87 
15.96 
18.95 
16.40 
14.64 
17.00 
29.48 
- 3305 
- 3211 
- 3733 
- 3766 
- 3494 
- 287 
- 10 
4- 378 
- 1050 
- 1398 
- 869 
- 2360 
- 379 
- 3170 
- 1312 
- 503 
- 550 
- 1261 
— - ~ ! 
o. 8: 
1. 1' 
0. 61 1 
0. 5i 1 
0.9}- 
1.5',' 
1.2! I 
0. 7( 
t 
1 
t 
1 
28 
Tin 
29 
30 
31 
...do 
..do 
Aluminium 
....do 
Manganese 
...do 
Molybdenum . .. 
....do 
....do 
Lead 
do 
Antimony 
Bismuth 
32 
33 
34 
35 
36 
45 
37 
46 
38 
39 
1.5* 
1. 31; 
0. 5£ 
2.2(1 
i.m 
2.15. 
2.3C 
2. OS 
1.12 
( 
47 
52 
54 
53 
....do 
Zinc 
....do 
16.57 
44.55 
25.17 
2.10 2.03 
0.51 0.32 
1.34 1.14 
15.83 
44.19 
24.51 
- 443 
+ 612 
+ 296 
2. 12. 
0.57? 
1.41 
PURIFIED WIRES. 
A. Thrice 
12.86 
14.02 
2.90 2.65 
2.52 2.58 
12.04 
13.27 
2. 96« 
2.50' 
fused. 
C. Thrice 
fused. 
...do 
DI 
3CTJSS 
ION A 
ND I]N 
FERENC 
ES. 
1 
Earlier results. — I shall pass rapidly over the above data for density* 
resistance and thermo-electric behavior, since they are frequently pro- 
visional. They exhibit a definite method of work carried to an issue. 
The results are of increasing value in proportion as they lead to the 
relation between electrical resistance and temperature-coefficient of I 
electrical resistance, to which I have already adverted. 
Here I may state that the original attempts to co-ordinate resist- 
ance and thermo electric power were made by Dr. Strouhal and myself 1 
in discussing data for steel. The striking success of this attempt, to 
which a large number of subsequent results gave additional and final 
warranty, led us naturally to seek for similar relations in alloys of one 
metal with consecutive small parts of a second metal. These results, 
1 Cf. Wied. Ann., vol. 7, 1879, p. 383 ; ibid, 1880, vol. 11, p. 930. 
(70S) 
