24 
DE. A. MATTHIESSEN AKD M. VON BOSE ON THE INELTJENCE OE 
Table XVI. 
T. 
Silver. 
Copper. 
Oold. 
Zinc. 
Cadmium. 
Tin. 
Lead. 
Arsenic. 
Antimony. 
BismutL 
Calculated 
values 
from mean 
of formulse. 
Greatest 
differ- 
ence from 
mean. 
o 
0 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
100-00 
0-00 
20 
92-74 
92-62 
92-99 
92-92 
92-93 
93-04 
92-62 
92-56 
92-45 
93-18 
92-80 
0-38 
40 
86-26 
85-96 
86-65 
86-50 
86-46 
86-51 
85-96 
85-82 
85-73 
86-83 
86-27 
0-56 
60 
80-57 
80-01 
80-98 
80-75 
80-60 
80-59 
80-04 
79-80 
79-84 
80-93 
80-41 
0-61 
80 
75-67 
74-80 
76-01 
75-66 
75-35 
75-10 
74-85 
74-50 
74-77 
75-49 
75-23 
0-78 
100 
71-56 
70-31 
71-70 
71-23 
70-70 
70-11 
70-39 
69-88 
70-54 
70-51 
70-69 
1-01 
Again, in Table XVII., we give the conducting power of the metals compared with 
hard-draum silver wire at 0°=100, first at 0° and then at 100°, and, lastly, taking silver 
at 100°=100. 
Table XVIL 
Conduct! 
At O’. 
ng power 
At 100°. 
Taking silver 
= 100 at 100°. 
Silver (hard drawn) 
100-00 
71-56 
100-00 
Copper (hard drawn) 
99-95 
70-27 
98-20 
Gold (hard drawn) 
77-96 
55-90 
78-11 
Zinc 
29-02 
20-67 
28-89 
Cadmium 
23-72 
16-77 
23-44 
Tin 
12-36 
8-67 
12-12 
Lead 
8-32 
5-86 
8-18 
Arsenic 
4-76 
3-33 
4-65 
Antimony 
4-62 
3-26 
4-55 
Bismuth 
1-245 
0-878 
1-227 
From these Tables we think we may deduce the law, that all 'pure metals in a solid 
state vary in conducting power between 0° and 100° to the same extent^ more especially as 
we find that wires of one and the same metal show almost the same differences as were 
found between the mean results obtained for the different metals. In Table XVIII. 
two examples of this are given. 
Table XVIII. 
T. 
Copper. 
Cadmium. 
I. annealed. 
III. annealed. 
II. 
III. 
6 
100 00 
100-00 
100-00 
100-00 
20 
92-85 
92-41 
92-44 
93-41 
40 
86-33 
85-62 
85-72 
87-22 
60 
80-43 
79-63 
79-84 
81-42 
80 
75-15 
74-44 
74-79 
76-03 
100 
70-49 
70-05 
70-60 
71-04 
In Table XIX. the resistances of the copper wires 1, 2, and 3, and those calculated 
from the mean of all the formulse, are given ; we do this to show that the resistance of 
