172 
DRS. A. MATT HIES SEN AND C. VOGT ON THE INFLUENCE OE 
Table IV. (continued). 
Tin-copper alloy, containing 14*91 vols. per cent, of tin. 
Length 141 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 0-501 mil lim . 
8-7481 at 15-5 
8-8372 at 16-5 
8-8451 at 17-3 
8-8441 at 17-0 
Reduced to 0°. 
8-8223 
8-9170 
8-9288 
8-9264 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
16-58 
8-8565 
8-8560 
+0-0005 
34-85 
8-7687 
8-7692 
-0-0005 
56-33 
8-6684 
8-6693 
-0-0009 
77-40 
8-5753 
8-5737 
+0-0016 
99-48 
8-4754 
8-4760 
-0-0006 
X =8-9364 - 0-0048890t+ 0-000002626*: 2 . 
Table IV. (continued). 
Tin-copper alloy, containinj 
Length 210 millims. ; 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
z 6*02 vols. per cent, of tin. 
diameter 0-456 millim. 
0 Reduced to 0°. 
19-382 at 15-5 19-682 
19-517 at 15-5 19-819 
19-496 at 16-4 19 816 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
17-23 
19-484 
19-484 
0-000 
24-03 
19-355 
19-354 
+0-001 
40-03 
19-050 
19-052 
-0002 
55-47 
18-771 
18-769 
+0-002 
69-70 
18-511 
18-513 
-0002 
83-16 
18-279 
18-276 
+0-003 
98-87 
18-004 
18-006 
- 0-002 
X=19-820-0-019729*f+000001397*: 2 . 
9. 
Tin-copper alloy, containinj 
Length 429 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 
1 12*35 vols. per cent, of tin. 
diameter 0-627 millim. 
Reduced to 0°. 
10 037 at 17-9 10154 
10-076 at 18-2 10-196 
10 084 at 17-2 10197 
10-084 at 16-6 10-193 
T. 
C onducting-power. 
11-0 
10-1386 
55-5 
9-8710 
100 0 
9-6526 
X = 10-2 1 2 -0-0068043* I +0-00001210*: 2 . 
12 . 
Tin-copper alloy, containing 1*41 vol. per cent, of tin. 
Length 599 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 0-449 mi llim . 
60-105 at 14-5 
60-827 at 12-5 
60-687 at 141 
60-579 at 15-1 
60-690 at 14-3 
Reduced to 0° 
62- 463 
62-881 
63- 001 
63-055 
63-038 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-53 
60-470 
60-455 
+0-015 
24-68 
59-011 
59-029 
-0018 
3903 
56-897 
56-900 
-0*003 
54-98 
54-681 
54-686 
-0-005 
68-73 
52 924 
52-906 
+0-018 
84-25 
51*036 
51-041 
-0-005 
99-70 
49-334 
49-336 
-0-002 
X = 62-997 - 0-16856t+0-0003163t 2 . 
10 . 
Tin-copper alloy, containing ll*6l vols. per cent, of tin. 
Length 322-5 millims. ; diameter 0-524 millim. 
Conducting-power found before o Reduced to 0°. 
heating the wire 12-003 at 12-1 12-102 
Ditto, after being kept at 100° 
for 1 day 12-069 at 11*5 12-165 
Ditto, for 2 days 12-083 at 12-5 12-188 
Ditto, for 3 days 12-070 at 14-3 12-190 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
15-43 
12-058 
12-057 
+0-001 
i 23-40 
11-990 
11-991 
-0-001 
I 40-35 
11-852 
11-853 
-0-001 
1 54-75 
11-737 
11-736 
+0-001 
1 69-78 
11-619 
11-617 
+0-002 
84-66 
11-499 
11-500 
-0-001 
98-70 
11-391 
11-391 
0-000 
13. 
Tin-silver alloy, containing 96*52 vols. per cent, of tin. 
Length 304 millims. ; diameter 0-478 millim. 
Conducting-power found before 0 Reduced to 0°. 
heating the wire 11-646 at 16‘3 12-390 
Ditto, after being kept at 100° 
for 1 day 11 686 at 16-3 12-433 
Ditto, for 2 days 11-685 at 17'0 12-464 
Ditto, for 3 days 11668 at 17-6 12-475 
T. 
Conducting-power. j 
1 Difference. 
Observed. 
Calculated. 
11-12 
11-983 
11-971 
+0-012 
24-90 
11-353 
11-364 
-0-011 
39-40 
10-751 
10-768 
-0017 
54-60 
10-193 
10-189 
+0-004 
69-81 
9-676 
9-657 
+0019 
84-88 
9178 
9-177 
+0-001 
99-68 
8-743 
8-751 
-0-008 
X= 12-186 — 0-008468*: -f-0-000003700*; 2 . 
X= 12-488 — 0 047691*54-0 0001023*: 2 . 
