TEMPERATURE ON THE ELECTRIC CONDUCTING-POWER OE ALLOYS. 169 
Table II. contains the conducting-powers, specific gravities, and equivalents of the 
metals used for making the alloys. These values are those which have been used in 
calculating the results given in this paper. 
Table II. 
Metal. 
Conducting-power 
at 0 s . 
Specific gravity. 
Equivalent. 
Silver (hard drawn) 
100-00 
10-468 
108-0 
Silver (annealed) 
Copper (hard drawn) 
108-57 
99-95 
8-950 
31-7 
Gold (hard drawn) 
77-96 
19-265 
1970 
Gold (annealed) 
Zinc 
79-33 
29-02 
7-148 
32-6 
Cadmium 
23-72 
8-655 
56-0 
Palladium (hard drawn) . . . 
18-45 
11-500 
Platinum (hard drawn) . . . 
17-99 
21-400 
Iron (hard drawn) .'. 
Nickel 
16-81 
1311 
7- 790 
8- 50 
Tin 
12-36 
7-294 
580 
Thallium 
9-16 
11-900 
Lead 
8-32 
11-376 
103-7 
Bismuth 
1-245 
9-822 
208-0 
Tables III., IV., V., and VI. contain the results obtained with the alloys belonging 
to the different groups. The alloys marked thus (f) are those which were made and 
used for former experiments; in all cases, however, fresh wires were made. All the 
rest have been re-made and analyzed. In Table III. the results are given which were 
obtained with some alloys made of those metals which, when alloyed with ope another, 
conduct electricity in the ratio of their relative volumes ; in Table V. those with some 
alloys of those metals which, when alloyed with one another, do not conduct electricity 
in the ratio of their relative volumes, but always in a lower degree than the mean of 
their volumes ; in Table IV. those with some alloys made with the metals belonging to 
the alloys given in Table III. with those in Table V. ; and in Table VI. those with some 
alloys whose places in the foregoing Tables we have not yet been able to assign. 
Table III. 
1. 
fSn 6 Pb, containing 16-04 volumes per cent, of lead. 
Length 435-5 millims. ; diameter O' 793 millim. 
Conducting-power found before 0 Reduced to 0°'*. 
heating the wire 11*782 at 13*7 12-423 
Ditto, after being kept at 100° 
for 1 day 12-052 at 9-3 12-494 
Ditto, for 2 days 12-088 at 9-1 12-522 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
1003 
12043 
12 033 
+0-010 
24-56 
11-371 
11-381 
-0-010 
39-27 
10-760 
10-768 
-0 008 
55-00 
10-168 
10-165 
+0-003 
67-73 
9-720 
9-716 
+0-004 
84-93 
9-175 
9-165 
+0-010 
98-87 
8-757 
8-766 
-0009 
X = 12-5 1 0 - 0 04861 9*;+0-0001 087t 2 . 
2 . 
fSn 4 Cd, containing 83-10 volumes per cent, of tin. 
Length 285 millims. ; diameter 0-417 millim. 
Conducting-power found before 0 Reduced to 0°. 
heating the wire 14-259 at 6-8 14-658 
Ditto, after being kept at 100° 
for 1 day 14-207 at 6-2 14-569 
Ditto, for 2 days 14-072 at 7‘7 14-517 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
8-72 
13-986 
13-985 
+0-001 
25-52 
13-089 
13092 
-0-003 
39-50 
12-419 
12-423 
-0004 
54-96 
11-770 
11-761 
+0009 
69-40 
11-218 
11-217 
+0001 
84-02 
10-733 
10-740 
-0-007 
98-85 
10-333 
10-330 
+0-003 
X = 1 4-487— 0-059047if+0-0001720t 2 . 
* These and all similar values were reduced to 0° as described in the paper “ On the Influence of Tempe- 
rature on the Electric Conducting-power of the Pure Metals,” Philosophical Transactions, 1862, p. 10. 
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