in Alloys of Bismuth and Tin. D795 
It will be seen that the values of o in this case are some- 
what smaller than those obtained for the two former alloys. 
Also from fig. 4, which represents the relation between o 
and @, it appears that the Thomson effect vanishes at about 
—190° C. : 
Fig. 4. 
| 
o!}-4 
Mile | | 

) | A.Loy N° 3. 




) 
/ 
| 
| 
| 
50 
IX. Experiments with Alloy No. 4. 
This alloy contains 23°6 per cent. tin. 
Mean diameter of rods =5°50 mm. 
Mean resistance of rods =0°0000425 ohm per mm. 
Some observations taken are shown in Tables IX. and X. 
TasLE ]X.—Thomson Effect. 



C = 4 amperes. xz, = 215 cms @ = 96°'S 
d@ 
2, =215 5, dg = 9'96 degree per mm. 
H 4 Hs | é 
ett) eee | 
1°35 | =a jer 
240 | —T7°54 | 
B45 | —5 46 2710 
4-49 —7'58 
71 | —7°62 
8-2 —5°41 Fa 
859 | —T7-46 2-09 
9°55 | ) — 533 
} 
Mean value ford... 2°12 
Correction ... 715 
é ore 1:97 
