198 
DES. A. MATTHIESSEN AND C. VOGT ON THE INFLUENCE OF 
Table XXVII. (continued). 
3. 
*j*BiPb 2 , containing 53*74 volumes per cent, bismuth. 
Length 224 millims. ; diameter 0*643 millim. 
T. 
Cone 
966 
1*8543 
16*5 
2*0385 
12*5 
2*0346. 
125 
2*0296. 
93*8 
1*8539; 
97*0 
1*8708! 
12*8 
2*0683' 
10*5 
2*0277. 
97*8 
1-8617! 
93*8 
1*8848! 
11-7 
2*0831' 
Conducting-power. 
h m 
>1 10 1 
.1st day. 
>4 15 1 3rd day. 
> 30 J 
>1 30 1 
>5 10 [4th day. 
> 25 J 
The conducting-power found in a former research was 
2-09 at 22°*2. 
4. 
fBi Sn 8 , containing 25*04 volumes per cent, bismuth. 
Length 194 millims. ; diameter 0*713 millim. 
T. 
Conducting-power. 
94*8 
h m 
5*3564 - 
5*4696 J ” 1st day. 
6*7776 > 30 J 
88*4 
11*6 
7*5 
89*5 
92*9 
7*6698 j 3Q 
5*6474 . , , 
5*3921 >4 « 2nd day. 
6*7511 > 30 
12*3 
10*3 
7*6086 3rd day. 
The conducting-power found in a former research was 
7*82 at 24°*9. 
5. 
*j*Bi 4 Pb, containing 90*28 volumes per cent, bismuth. 
Length 90*5 millims . ; diameter 0*689 millim. 
T. Conducting-power. 
10*3 
0*5299 
94*4 
0*5615 
94*1 
0*5654 
13*3 
0*5439 
10*0 
0*5402 
94*6 
0*5682 
13*6 
05437 
6*0 
0*5413 
93*8 
0*5686 
94 0 
0*5682 
9*6 
0*5430 
h m 
>1 50] 
>3 0 [ 
>1 oJ 
>2 0 \ 
>0 30 J 
>1 0 
>4 0 
>0 30 
1st day. 
2nd day. 
3rd day. 
The conducting-power found in a former research was 
0*521 at 20’*0. 
These results need a little explanation ; on the first two series no remarks are neces- 
sary, but on the three last we will say a few words. On experimenting with a wire of 
Bi Pb 2 we observed nothing remarkable at first, but after making a series of observations 
at different temperatures up to 100°, on cooling the wire the same conducting-power 
was not observed for the same temperature as when heating ; at first we thought this 
was due to the wire being badly soldered, but on resoldering it the same results were 
obtained. In the Table the third series will read thus : at 96 0, 6 the conducting-power 
was found T8543 ; on cooling rapidly to 16 0, 5 it was found equal to 2*0386 ; on testing 
it the next morning at 12°*5 it was 2*0346, showing a loss in conducting-power, for it 
ought to have conducted better, as the temperature is lower ; on the third morning we 
find it still lower ; and on the same day, after being kept at 100° for about 44 hours, 
