176 
DBS. A. MATTHIESSEN AND 0. VOGT ON THE INFLUENCE OF 
Table V. (continued). 
Table V. (continued). 
14. 
17. 
Copper-silver alloy, containing 95*17 volumes per cent, 
of copper (hard drawn). 
Length 929 millims. ; 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
Ditto, for 3 days 
diameter 0'489 millim. 
78' 165 at 16-0 
78-286 at 14-3 
78-102 at 15-9 
77-666 at 17-8 
Reduced to 0°. 
82-300 
81- 981 
82- 207 
82-245 
, 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-43 
78-226 
78-219 
+0-007 
24-26 
76-066 
76-059 
+0-001 
39-16 
72-601 
72-616 
-0-015 
54-62 
69-301 
69 312 
-0-011 
69-48 
66-406 
66-393 
+0-013 
83-53 
63-885 
63-866 
+0-019 
99-00 
61-319 
61-343 
-0-014 
X = 82-207 - 0-26728#+0-000571 1 1 \ 
Copper-silver alloy, containing 8*25 volumes per cent, 
of copper (hard drawn). 
Length 2328 millims. ; diameter 0-525 millim. 
Conducting-power found before 0 Reduced to 0°. 
heating the wire 78-323 at 9-0 80-284 
Ditto, after being kept at 100° 
fori day 78-855 at 8-5 80-718 
Ditto, for 2 days 78-398 at 10-2 80-626 
T. 
Conducting-power. 
120 
87-015 
56-0 
69-301 
100-0 
61*949 
X = 80-628 - 0-22196*; -t-0-00035 1 8 
18. 
15. 
Copper-silver alloy, containing 77*64 volumes per cent, 
of copper (hard drawn). 
Length 623 millims. ; 
Conducting-poWer found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
Ditto, for 3 days 
Ditto, for 4 days 
diameter 0-374 millim. 
Reduced to 0°, 
66-807 at 14-6 69-811 
66-601 at 17-3 70-158 
66-550 at 17-2 70-084 
66-707 at 17-0 70-208 
66-694 at 17-6 70-319 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-15 
67-155 
67-192 
-0-037 
24-21 
65-433 
65-410 
+0023 
39-48 
62-583 
62-565 
+0-018 
54-90 
59-873 
59-894 
-0-021 
69-48 
57-557 
57-556 
+0-001 
84-28 
55-375 
55-365 
+0-001 
99-90 
53-259 
53-262 
-0-003 
X = 70-328 -0-2135 1#+0-0004271*: 2 . 
16 . 
Copper-silver alloy, containing 1*53 volume per cent, 
of copper (hard drawn). 
Length 2139 millims. ; diameter 0-542 millim. 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
0 Reduced to 0°. 
94- 554 at 9-8 97-708 
95- 314 at 9-0 98-231 
94-968 at 9*9 98-168 
T. 
Conducting-power. J 
10-0 
94-940 
55-0 
82-126 
100-0 
72-146 
X = 98- 1 72 - 0-033024^+0-0006998*: 2 . 
19. 
Iron-gold alloy, containing 27*93 volumes per cent, 
of iron (hard drawn). 
Length 145 millims. ; diameter 0-758 millim. 
Copper-silver alloy, containing 46*67 volumes per cent, 
of copper (hard drawn). 
Length 1256 millims. ; diameter 0-437 millim. 
Conducting-power found before 0 
heating the wire 72-036 at 14-2 
Ditto, after being kept at 100° 
fori day 73-170 at 14-6 
Ditto, for 2 days. 73-653 at 12-6 
Reduced to 0°. 
74*940 
76-204 
76-284 
T. 
Conducting-power. 
130 
73-529 
56-5 
65-449 
100-0 
58-894 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
Ditto, for 3 days 
Reduced to 0°. 
2-5815 at 14-6 2-7160 
2-6193 at 14-4 27539 
2-6309 at 14-2 2 7641 
2-6286 at 144 2-7636 
T. 
Conducting-power. 
lS-0 
2-6239 
57-5 
2-2732 
100-0 
1-9926 
X= 2-7645 — 0-0096586*; -j-0-00001940^ 2 . 
The conducting-power of a se- 
cond wire was found 
Reduced to 0°. 
2-7451 
X=76-240-0-21375*;+0-0004030if 2 . 
2-6177 at 14-6 
