174 
DES. A. MATTHIESSEN AND C. VOGT ON THE INFLUENCE OF 
Table V. 
l. 
Gold-copper alloy, containing 98*63 volumes per cent, 
of gold (hard drawn). 
Length 1121-5 millims. ; diameter 0-582 millim. 
Conducting-power found before 0 Seduced to 0°, 
heating the wire 53'694atl6-8 56-122 
Ditto, after being kept at 100° 
for 1 day 5379 6 at 16-5 56-184 
Ditto, for 2 days 53 835 at 16*7 56-268 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-52 
53-972 
53-980 
-0-008 
25-10 
52-676 
52-653 
-f 0-023 
39-74 
50-684 
50-715 
-0-031 
55-66 
48-739 
48-740 
-0-001 
69-83 
47106 
47-092 
+0-014 
85-00 
45-451 
45-443 
+0-008 
95-35 
43-986 
43-994 
-0008 
X= 56-232— 0-14916;!+00002616!! 2 . 
Gold-copper alloy, containing 81*66 volumes per cent, 
of gold (hard drawn). 
Length 450 millims. ; diameter 0-501 millim. 
Conducting-power found before 0 Eeduced to 0°, 
heating the wire 15-919 at 13-6 16-083 
Ditto, after being kept at 100° 
fori day 15935 at 111 16068 
Ditto, for 2 davs 15-895 at 12-2 16-041 
Ditto, for 3 days 15-894 at 11 0 16 026 
Ditto, for 4 days 15-887 at 11*4 16-024 
T. 
Conducting-power. 
120 
15-880 
56-0 
15-356 
1000 
14-837 
Table Y. (continued). 
4. 
Gold-silver alloy, containing 79*86 volumes per cent, 
of gold (annealed*). 
Length 596 millims. ; diameter 0-704 millim. 
X = 16024-0011997<-|-000000129n 2 . 
3. 
Gold-silver alloy, containing 79*86 volumes per cent, 
of gold (hard drawn). 
Length 605 - 7 millims. ; diameter 0-704 millim. 
Conducting-power found before 0 Eeduced to 0° 
heating the wire 21-010 at 11-7 21-279 
Ditto, after being kept at 100° 
for 1 day 21-038 at 10-8 21-286 
Ditto, for 2 days 21072 at 10-4 21-311 
Ditto, for 3 days 21-086 at 10-2 21-301 
T. 
Condueting-power. 
Difference. 
Observed. 
Calculated. 
7-64 
21-342 
21-341 
+0001 
25-27 
20-920 
20-924 
-0001 
40-71 
20-570 
20572 
-0-002 
54-61 
20-265 
20264 
+0-001 
70-35 
19-930 
19-928 
+0002 
85-25 
19-622 
19-622 
0000 
99-50 
19-338 
19-339 
-0001 
X = 21-527-0024475^+000002500t 2 . 
5. 
Gold-silver alloy, containing 19*86 volumes per cent, 
of gold (hard drawn). 
Length 161-5 millims. ; diameter 0-351 millim. 
Conducting-power found before 0 Eeduced to 0° 
heating the wire 21-835 at 11*7 22 062 
Ditto, after being kept at 100° 
for 1 day 21-872 at 1 1-8 22-101 
Ditto, for 2 days 21-841 at 12 5 22-083 
T. 
Conducting-power. 
Difference. 
Observed. | 
Calculated. 
11-45 
21-013 
21-030 
+0-001 
2604 
20-698 
20-701 
-0-003 
4004 
20-391 
20392 
-0-001 
55-26 
20065 
20-064 
+0001 
67-73 
19-806 
19-802 
+0-004 
84 13 
19 463 
19-464 
-0-001 
98-45 
19 175 
19-176 
-0001 
X =21-293— 0023166^-f00000169D 2 . 
T. 
Condueting-power. 
Difference. 
Observed. 
Calculated. 
1302 
21-838 
21-833 
+0-005 
23-90 
21-620 
21-625 
-0005 
38-03 
21-355 
21-359 
-0-004 
54-42 
21158 
21-056 
+0-002 
68-95 
20-795 
20-794 
+0-001 
82-37 
20-557 
20-555 
+0 002 
98-15 
20-279 
20-280 
-0001 
X = 22-085 - 0-01 95 38^+ 000001 1 73 1 3 . 
6 . 
Gold-silver alloy, containing 19*86 volumes per cent, 
of gold (annealed*). 
Length 161-5 millims. ; diameter 0-351 millim. 
T. 
Condueting-power. 
Difference. 
Observed. 
Calculated. 
1495 
21-829 
21-827 
+0-002 
24-56 
21-637 
21-640 
-0003 
40-33 
21-335 
21-337 
-0-002 
55-38 
21059 
21-055 
+0 004 
69-06 
20-806 
20-805 
+0001 
84-48 
20-527 
20-528 
-0001 
97 53 
20-299 
20-300 
-0001 
X = 22-125— 0-020097t+000001419;! 2 . 
* The conducting-power of these wires did not alter after being kept oi 100° for one day. 
