532 Mr. V. J. Blyth on the Influence of 



arrangement were experimented with. In one form each 

 pair of arms consisted of a straight bar of the metal let into 



Fig. 1. 



Copper bloc vr 



$T£AM BATH 



the blocks in the heating and cooling chambers at its ends, 

 and having a therm o-junction at its middle point. After the 

 flow of heat along the bars had become steady the two 

 junctions were found to be at nearly the same tempera- 

 ture ; but when one half of one of the bars was subjected to 

 a transverse magnetic field, this balance was disturbed to a 

 greater or less extent, according to the field applied. With 

 this arrangement soft iron was tested under a transverse field 

 of 2650 c.G.s., and the change of temperature-difference was 

 0*3 or 0*4 scale-division ; for hard steel a similar small 

 change of 0"5 division was obtained by application of a field 

 of 4800. These changes are too small to be regarded as 

 definite. The experiments with mild steel at higher field- 

 strengths are tabulated below. 





Field. 



Change in Tempe- 

 rature-difference. 



Percentage diminu- 

 tion of Conductivity. 



Field across hotter | 

 half of bar J 



Field across colder "[ 

 half of bar J 



9400 

 8400 



9400 

 8400 



36 scale-divisions 

 26 „ 



13-6 „ 



8 ,, 



30 



2-1 



3-6 

 2-1 



