TEMPERATURE ON THE ELECTRIC CONDUCTING-POWER OE ALLOYS. 179 
Table IX. 
Volumes 
Conducting-power. 
per cent. 
A. 
B. 
98*63 of A i7 
56122 
16083 
81-66 of Au 
79-86 of Au 
21-393 
21-279 
79-86 of An 
21-527 
52-08 of Au 
15-030 
52-08 of Au 
15-080 
19-86 of Au 
21-305 
22-062 
19-86 of Au 
22125 
19-17 of Au 
20-514 
0-71 of Au 
84-008 
19-65 of Pt 
6-6960 
5 05 of Pt 
18031 
2-51 ofPt 
31-640 
23-28 of Pd 
8-5214 
98-35 of Cu 
89-544 
95-17 of Cu 
82-300 
77-64 of Cu 
69-311 
46-67 of Cu 
74-940 
8-25 of Cu 
80-284 
1-53 of Cu 
97-708 
27-93 of Fe 
2-7350 
21-18 of Fe 
1-9901 
10-96 of Fe 
2-3102 
0-46 of Fe 
38-852 
Formulae for the correction of the conducting- 
power for temperature. 
Gold-copper (hard drawn) 
Gold-copper (hard drawn) 
Gold-silver (hard drawn) 
Gold-silver (annealed) 
Gold-silver (hard drawn) 
Gold-silver (annealed) 
Gold-silver (hard drawn) 
Gold-silver (annealed) 
Gold-copper (hard drawn) 
Gold-copper (hard drawn) 
Platinum-silver (hard drawn) 
Platinum-silver (hard drawn) 
Platinum-silver (hard drawn) 
Palladium-silver (hard drawn) 
Copper-silver (hard drawn)t .. 
Copper-silver (hard drawn)! . . 
Copper-silver (hard drawn)! . . 
Copper-silver (hard drawn)! .. 
Copper-silver (hard drawn)! .. 
Copper-silver (hard drawn)! .. 
Iron-gold (hard drawn) 
Iron-gold (hard drawn) 
Iron-gold (hard drawn) 
Iron-copper (hard drawn) 
X=56-122 - 
X = 16083 - 
X=21-335 - 
X=21'584*- 
X= 15030 - 
X= 15-080 - 
X=21-684 - 
X=21-746*- 
X=20-514 - 
X= 84-008 - 
X= 6-6960- 
X= 18-031 - 
X=31-640 - 
X= 8-5214- 
X=89-544 - 
X = 82-300 - 
X = 69-8 11 - 
X=74-940 - 
X= 80-284 - 
X =97-708 - 
X= 2-7350- 
X= 1-9901- 
X= 2-3102- 
X=38-852 - 
0-14887# +0-000261 1# 2 
0012041# +0-000001296# 2 
0-023212# +0-00001694# 2 
0 024539# +0 00002506# 2 
0010120# +0-000003697# 2 
0010864# +0000007457# 2 
0019185# +000001 152# 2 
0019753# +0 00001395# 2 
0-017718# +0-00001 170# 2 
0-27895# +0 0006139# 2 
0 0022 1 43#+0 00000 1393# 2 
0013949# +000001 182# 2 
0039363# +0-00003642# 2 
0-002764# — 0-000001314# 2 
0-30886# +0-0007155# 2 
0-26758# -I-0-0005717# 2 
0-21194# +0-0004240# 2 
0 21011# +0-0003961# 2 
0-22101# +0-0003503# 2 
0-32868# +0-0006965 # 2 
■ 0-0095555#+000001919# 2 
0-0059 194#+0-00002426# 2 
■ 0-001 1260#+0 000000239 1# 2 
■ 0060341# +000008128# 2 
Table X. 
Alloy. 
Weight 
Conducting-power. 
Formulae for the correction of the conducting- 
per cent. 
A. 
B. 
power for temperature. 
Phosphorus-copper (hard drawn).. 
Phosphorus-copper (hard drawn).. 
Arsenic-copper (hard drawn) 
Arsenic-copper (hard drawn) 
Arsenic-copper (hard drawn) 
2-5 ofP 
0-95 of P 
5-4 of As 
2-8 of As 
traces of As 
7-301 
23-920 
6-219 
13-356 
60-854 
7-343 
23-368 
6-374 
12-379 
61-255 
X = 7-322 - 0-0034870#+0000001 052# 2 
X= 23-644 - 0-031 238# +000003882# 2 
X= 6-296 —0-0023492#+00000006230# 2 
X=12-867-00094757#+0 000005743# 2 
X=61-055 -016134# +00002948# 2 
The values in columns A. and B. do not agree in all cases as well as might have been 
expected. Part of these differences are undoubtedly due to the fact that, the length of all 
wires made of alloys melting at a low temperature was measured after the determination 
had been made, as we found very great difficulty in soldering them to the thick copper 
wires in thetrough, for, owing to their low fusing-points, the ends of the wires melted in 
with the solder. Now they had to be wound round a glass rod, as their length would 
not permit of their being experimented with in the trough without it ; it is therefore 
probable that, on account of their softness, in unwinding and straightening them they 
became somewhat lengthened, which will account in a great measure for the differences. 
The value given for the conducting-power of one alloy (lead-silver, containing 30-64 per 
‘cent, of lead, and corresponding to Pb Ag 2 ) in the paper already referred to is wrong. 
* These values have been altered to the same extent as those given in column B. for the hard- drawn wires, 
in order that the effect of annealing may remain the same. 
f The alloys of these metals formerly tested do not quite correspond in composition to those here given, and 
therefore the values then found for their conducting-powers are not quoted above. They agree, however, very 
closely with those in column B. 
