180 
DBS. A. MATTHIESSEN AISTD 0. VOGT ON THE INFLUENCE OF 
We not only used part of the same alloy employed for the former determinations, but 
also made and analysed a fresh quantity, and found the values for the conducting-power 
in both cases the same ; the present value is therefore the correct one for the conducting- 
power of the alloy. The error made in the former determinations must have been that 
a wrong normal wire was noted down as the one with which the resistances of the wires 
were compared ; for according to the data from which the conducting-powers were then 
deduced, those there given are correct. 
In order to show in a clear manner the results obtained, and to explain the law which 
we have arrived at, we will give in the first place the following Tables : — 
Table XI. 
Alloy. 
Volumes 
per cent. 
Conducting-power at 100°. 
Percentage decre&ent. 
Observed. 
Calculated. 
Observed. 
Calculated. 
Sn e Pb 
83-96 of Sn 
8-38 
8-28 
30-18 
29-67 
Sn, Cd 
83-10 of Sn 
10-35 
1010 
28-89 
30-03 
Sn„ Zn 
77-71 of Sn 
11-70 
11-37 
30-12 
30-16 
Pb' Sn 
53-41 of Pb 
7 16 
7-21 
29-41 
2910 
Zn Cd , 
26 06 of Zn 
17-97 
17-75 
29-86 
29-67 
Sn Cdj 
23-50 of Sn 
15-36 
14-88 
29-08 
30-25 
Cd Pb G 
10-57 of Cd 
6-62 
703 
27-74 
27-60 
Table XII. 
Alloy. 
Volumes 
per cent. 
Conducting-power at 100°. 
Percentage decrement. 
Observed. 
Calculated. 
Observed. 
Calculated. 
Lead-silver 
94-64 of Pb 
6-37 
9-35 
28-24 
19-96 
Lead-silver. 
46-90 of Pb 
10-63 
40-30 
16-53 
7-73 
Lead-silver 
30-64 ofPb 
18-08 
50-83 
17-36 
10-42 
Tin-gold 
90-32 of Sn 
6-25 
13-23 
24-20 
13-84 
Tin-gold 
79-54 of Sn 
3-70 
18-23 
22-90 
5-95 
Tin-copper (bard drawn) 
93-57 of Sn 
8-58 
12-72 
28-71 
19-76 
Tin-copper (hard drawn) 
83-60 of Sn 
9-39 
18-90 
26-24 
14-57 
Tin-copper (hard drawn)....'. 
14-91 of Sn 
8-37 
61-42 
5-18 
3-99 
Tin-copper (hard drawn) 
12-35 of Sn 
9-60 
63-02 
5-48 
4-46 
Tin-copper (hard drawn) 
11-61 of Sn 
11-30 
63-47 
6-60 
5-22 
Tin-copper (hard drawn) 
6-02 of Sn 
17-89 
66-93 
9-25 
7-83 
Tin-copper (hard drawn) 
1-41 of Sn 
48-89 
69-78 
21-74 
20-53 
Tin-silver 
96-52 of Sn 
8-67 
10-90 
30-00 
23-31 
Tin-silver 
75-51 of Sn 
9-71 
23-91 
2918 
11-89 
Zinc-copper (hard drawn) 
42-06 of Zn 
19-09 
49-57 
12-40 
11-29 
Zinc-copper (hard drawn) 
29-45 of Zn 
19-21 
55-89 
11-49 
10-08 
Zinc-copper (hard drawn) 
23-61 of Zn 
24-68 
58-82 
12-79 
12-30 
Zinc-copper (hard drawn) 
10-88 of Zn 
38-76 
65-20 
17-41 
17-42 
Zinc-copper (hard drawn) 
5-03 of Zn 
47-93 
68-13 
20-61 
20-62 
