18 
DE. A. MATTHIESSEN AND M. VON BOSE ON THE INELIJENCE OE 
The observed conducting powers in this and the foregoing Table do not agree so well 
with the calculated as the others, on account of the temperature of the bath never being 
exactly the same as that of the 'wire ; for in the one case the heat had to traverse the 
glass tube filled with air, in the other the thickness of the pipe-stem, before reaching the 
metal. 
The conducting power of antimony was found equal to 
o Eecluced to 0°. 
4-29 at 18-7 4-6172 
Using this value as before described, we obtain a formula for antimony where 
X=4-6172-0-018389^+0-00004788^l 
Bismuth. 
Pm-ified by reducing the basic nitrate of bismuth with lampblack. Table XL gives 
the results. The wires were pressed. 
Table XI. 
First wire. 
Second wire. 
Third wire. 
Length 
117 raillims. 
121*4 millims. 
42*5 millims. 
Diameter 
0‘596 millim. 
0*596 millim. 
0*217 millim. 
Conducting power 
found before heat- 
ing the wires 
Conducting power 
after being kept at 
100° for 1 day ... 
Ditto, for 2 days... 
Ditto, for 3 days... 
„ Eeduced to O’. 
M787 at 16-6 1*2317 
1*3599 at 17*6 1*4494 
1*3595 at 18*2 1*4521 
1*3624 at 18*0 1*4541 
0 Eeduced to O’. 
1*1036 at 18*8 1*1773 
1*3110 at 19-0 1*3995 
1*3121 at 19*0 1*4006 
1*3096 at 19-9 1*4023 
„ Eeduced to O’. 
1*2215 at 16*6 1*2951 
1*3683 at 17*8 1*4569 
1*3709 at 17-6 1*4587 
1*3710 at 17*9 1*4603 
The means of the conducting powers found for each of the following temperatures 
were — 
T. 
Conducting power. 
Difference. 
T. 
Conducting power. 
Difference. 
T. 
Conducting power. 
Difference. 
Obserred, 
Calculated. 
Observed. 
Calculated. 
Observed. 
Calculated. 
1 ® 
; 9-20 
26*15 
39*50 
57*25 
68*95 
84*35 
96*35 
1*4059 
1*3226 
1*2609 
1*1863 
1*1397 
1*0833 
1*0428 
1*4058 
1*3226 
1*2614 
1*1858 
1*1397 
1*0833 
1*0429 
+ 0*0001 
0*0000 
-0*0005 
+ 0*0005 
0*0000 
0*0000 
-0*0001 1 
8°*60 
24*00 
38*75 
55*30 
68*90 
84*00 
95*90 
1*3654 
1*2909 
1*2297 
1*1591 
1*1058 
1*0478 
1*0036 
1*3641 
1*2935 
1*2287 
1*1593 
1*1050 
1*0474 
1*0042 
+ 0*0013 
-0*0026 
+ 0*0010 
—0*0002 
+ 0*0008 
+ 0*0004 
-0*0006 
9*40 
25*65 
43*05 
67*45 
71*60 
88*60 
1*4129 
1*3329 
1*2551 
1*1913 
1*1315 
1*0671 
1*4128 
1*3339 
1*2538 
1*1912 
1*1328 
1*0666 
+ 0*0001 
-0*0010 
+ 0*0013 
+ 0*0001 
—0*0013 
+ 0*0005 
The formulae deduced from the observations, by which the conducting powers were 
calculated, were — 
