192 
DRS. A. MATTHIESSEN AND C. VOGT ON THE INFLUENCE OF 
Table XXL (continued). 
TablI: XXI. (continued). 
5. 
Copper, commercial, containing same impurities as 
No. 3 (hard drawn). 
Length 2246 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 0549 millim. 
. Reduced to 0°. 
74-660 at 16-8 78705 
74-958 at 16-4 78-921 
74-946 at 16-6 78-958 
74-576 at 18-2 78-958 
T. 
Conducting-power. 
13-0 
75-979 
56-5 
76-738 
100-0 
59-633 
8 . 
Silver, containing traces of tin (hard drawn). 
Length 2025 millims. ; 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for 1 day 
Ditto, for 2 days 
diameter 0-579 millim. 
„ Reduced to 0°. 
71- 427 at 13-6 73-964 
72- 668 at 13-8 75-287 
72735 at 13-7 75-338 
T. 
Conducting-power. 
14-0 
72-696 
570 
65-305 
1000 
59085 
X=75-355 - 0-19437*+0 0003167* 2 . 
X= 79-1 55 - 0-25 1 66t+0-0005644* 2 . 
6 . 
Copper, commercial, containing traces of lead, iron, 
antimony, and suboxide 
Length 3010 millims. ; 
Conducting-power found before 
heating the wire 
Ditto, after being kept at 100° 
for l day 
Ditto, for 2 days 
of copper (hard drawn), 
diameter 0-606 millim. 
„ Reduced to 0°. 
89-258 at 16-7 94-896 
89-241 at 17-4 95-118 
89-524 at 16-5 95-109 
T. 
Conducting-power. 
100 
91-849 
55-0 
78-402 
100-0 
68-324 
X = 95-294 - 0-35289*+0-0008309* 2 . 
9 . 
Silver, containing traces of gold (hard drawn). 
Length 1780 millims. ; diameter 0-648 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 
70- 847 at 10-4 
71- 205 at 11 -3 
70-951 at 13-5 
70-929 at 13-5 
Reduced to 0°. 
72717 
73-249 
73-366 
T. 
Conducting-power. 
Difference. 
Observed. 
Calculated. 
14-37 
70763 
70-746 
+0-017 
24-21 
69-036 
69044 
-0-008 
39-25 
66-531 
66-555 
-0-024 
54-43 
64-172 
64179 
-0-007 
69-51 
61-977 
61-954 
+0023 
84-30 
59-923 
59-905 
+0-018 
98-60 
58-028 
58047 
-0-019 
X = 73-336 - 0- 1 8447*+0-0002982* 2 . 
7 . 
10 . 
Silver, containing traces of lead (hard drawn). 
Length 1473 millims. ; diameter 0-513 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 
64- 909 at 13-6 
65- 957 at 14-6 
66- 404 at 13-6 
66-801 at 11-4 
Reduced to 0°. 
66-997 
68-235 
68-539 
68-599 
Silver, containing minute traces of arsenic (hard drawn). 
Length 1298 millims. ; diameter 0-376 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°. 
85- 119 at 14-0 88-931 
86- 795 at 9-0 89-285 
87- 881 at 7-4 89-949 
87-091 at 10-0 89-869 
T. 
Conducting-power. 
1^-0 
66-543 
56-0 
60-264 
100 0 
54-987 
X = 68-429 - 0- 1 6030*+0-00025 88t 2 . 
T. 
Conducting-power. 
110 
87029 
55-5 
76-185 
1000 
67-767 
X = 90 084 - 0-28442*+ 0-00061 25* 2 . 
