TEMPERATTJEE ON THE ELECTEIC CONDTJCTING-POWEE OF ALLOYS. 173 
Table IV. (continued). 
Table IV. (continued). 
14. 
Tin-silver alloy, containing 75*51 vols. per cent, of tin. 
Length 273 millims. ; diameter 0-467 miUim. 
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 
12- 982 at 17-6 
13054 at 171 
13- 334 at 16-5 
13-415 at 15-5 
13-402 at 16-5 
Eeduced to 0°. 
13-866 
13- 917 
14184 
14- 217 
14-256 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
li-53 
13-651 
13-646 
+0-005 
25-51 
12-955 
12-958 
-0-003 
40-26 
12-283 
12-283 
0000 
53-86 
11-700 
11708 
-0008 
69-58 
11-099 
11-099 
0000 
84-98 
10-572 
10561 
+0-011 
99-48 
10-103 
10-108 
-0005 
\ = 14-250— 0-053772^-|-0-0001219i! 2 . 
17- 
Zinc-copper alloy, containing 23-61 vols. per cent, of zinc. 
Length 365 millims. ; diameter 0-379 millim. 
Conducting-power found before 0 
heating the wire 27784 at 13-0 
Ditto, after being kept at 100° 
for 1 day 27754 at 14-9 
Ditto, for 2 days 27738 at 15-3 
Reduced to 0°. 
28-298 
28-343 
28-342 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-97 
27719 
27714 
+0-005 
23-80 
27-408 
27-412 
-0004 
39-28 
26-828 
26-829 
-0-001 
54-82 
26-259 
26-262 
-0-003 
68-66 
25-777 
25772 
+0005 
8375 
25-258 
25-256 
+0 002 
98-22 
24-774 
24776 
-0 002 
X = 28-345 - 0040104^+000003839^. 
15. 
Zinc-copper alloy, containing 42-06 vols. per eent.of zinc. 
Length 296-6 millims. ; diameter 0-516 millim. 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days , 
Ditto, for 3 days 
0 Eeduced to 0°. 
21-356 at 14-8 21-793 
21-701 at 12-9 22088 
21-873 at 13-1 22-269 
21-824 at 14-9 22-273 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
1572 
21-807 
21-801 
+0-006 
2375 
21-562 
21-564 
-0 002 
39-28 
21-116 
21-118 
-0-002 
' 54-38 
20-693 
20-698 
-0-005 
69-31 
20-300 
20-297 
+0-003 
84-63 
19-897 
19-898 
-0-001 
99-43 
19-527 
19-526 
+0-001 
X=22-274— 0-03060D+0-00002980!' 2 . 
18. 
Zinc-copper alloy, containing 10*88 vols. per cent, of zinc. 
Length 449 millims. ; diameter 0-448 millim. 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
Ditto, for 3 days 
0 Reduced to 0°. 
45-545 at 14-8 46-934 
45-807 at 14-0 47 128 
45-896 at 14-6 47276 
45-971 at 137 47-268 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
14-33 
45-912 
45-912 
0000 
2371 
45059 
45-056 
+0-003 
39-80 
43-638 
43-648 
-0-010 
54-33 
42-442 
42-440 
+0002 
69-48 
41-246 
41-245 
+0001 
84-38 
40-145 
40-134 
+0011 
98-95 
39100 
39109 
-0-009 
X = 47267 —0096627^+00001 433 1 \ 
16 . 
Zinc-copper alloy, containing 29*45 vols. per eent.of zinc. 
Length 190 m illim s. ; 
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 0-381 millim. 
0 Eeduced to 0°. 
21-235 at 17-4 21-708 
21-424 at 15-9 21-859 
21-597 at 15-9 22 036 
21-625 at 15-9 22-065 
21-720 at 12-8 22 075 
19. 
Zinc-copper alloy, containing 5-03 vols. per cent, of zinc 
Length 642 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 0-479 millim. 
0 Eeduced to O'. 
58-152 at 15-3 60-376 
58-546 at 14-3 60-637 
58-665 at 140 60-716 
58-598 at 14-3 60-691 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
13-47 
21-704 
21-702 
+0-002 
24-07 
21-413 
21-416 
-0 003 
39-21 
21-020 
21-017 
+0-003 
53-65 
20-647 
20-647 
0-000 
69-03 
20-268 
20-269 
-0-001 
8371 
19-915 
19-916 
-0001 
98-97 
19-565 
, 19-564 
+0-001 
X =22-076 - 0-028100;+0-00002745^ 2 . 
T. 
Conducting-power. 
Difference. ' 
: 1 
Observed. 
Calculated. 
15-17 
58-522 
58-494 
1+0-028 
23-57 
57-277 
57-301 
-0 024 
4003 
55071 
55 093 
-0022 
54-91 
53-211 
53-213 
—0-002 
67-88 
51-679 
51-664 
+0015 
84-15 
49-856 
49-839 
+0-017 
99-45 
48-228 
48-243 
-0-015 
X = 60-697 - 0 14995z t +0-0002486«; 2 . 
