barus.1 PYRO-ELECTRIC PROPERTIES OF ALLOYS. 133 
Table 30.— Electrical resistance of platinum alloys (thick wires)— Continued. 
[rider = leno;th-10.04 cm .] 
Alloy. 
Copper 
...do 
...do 
...do 
....do 
Nickel 
...do 
...do 
Cobalt 
...do 
...do 
...do....... 
...do 
Iron 
....do ....... 
...do 
...do 
...do 
...do 
...do 
Chromium... 
...do ....... 
...do 
...do 
Tin 
...do... 
...do 
Aluminium . 
..-.do 
Manganese . 
..do 
Molybdenum 
...do 
...do 
Lead 
.. do 
Antimony .. 
Bismuth 
...do 
Zinc 
..do 
Cadmium 
2397 
2628 
4899 
2118 
4531 
1739 
2110 
2503 
2379 
3245 
2680 
3617 
2004 
2961 
2946 
5071 
4585 
2409 
5025 
3791 
2166 
3294 
3227 
2652 
1714 
1942 
2961 
2001 
1743 
20. 11 
38.94 
1273 
1478 
1438 
1211 
1457 
2200 
1223 
1381 
3894 
1973 
1191 
<7 
» 
0.01315 
31.51 | 
1293 
33.97 
1303 
63.82 
i216 
25.69 
1232 
55.87 
0. 01261 
21.93 
1304 
27.51 
1346 
33.71 
0.01261 
30.01 
1239 
40.21 
1299 
34.83 
1233 
44.69 
1218 
24.45 
0. 01242 
36.80 
1275 
37.57 
1274 
64.62 
1209 
55. 55 
1227 
29.51 
1222 
61.70 
1220 
46.24 
0.01314 
28.47 
1268 
41. 75 
1314 
42.41 
1210 
32.06 
0. 01270 
21.78 
1337 
25.97 
1336 
39.56 
0. 01233 
24.68 
1265 
22.04 
0. 01298 
26.11 
1287 
50.11 
0. 01320 
16.79 
1298 
19.18 
1223 
17.61 
0.01278 
15.48 
1212 
17.68 
0.01343 
29.54 
0.01311 
16.04 
1200 
1C. CO 
0. 01232 
47.84 
0.01261 
24.75 
0. 01254 
15.0 
31.92 
31.41 
64.65 
26.18 
56.92 
22.22 
27.87 
34.14 
30.40 
40.73 
35.28 
37.27 
38.05 
65.47 
56.60 
30.06 
62.86 
47.11 
28.84 
42.30 
42.96 
32.67 
22.06 
26.30 
40.08 
25.00 
22.33 
26.45 
50.76 
17.01 
19.43 
17.94 
15.68 
18.01 
29.92 
16.25 
16.91 
48.74 
25.21 
EXPERIMENTAL DATA. 
Further mechanical treatment resistance of wires. — Leaving the dis- 
cussion and comparison of these results for the text below, I may state 
that the experiments were continued by rolling and drawing down the 
wires in a wire-plate to a mean diameter of about ,046 cm . With these 
dimensions, the wires were manifestly well suited for a repetition of the 
resistance measurements just discussed under conditions thoroughly dif- 
(787) 
