Forces of some Metallic Alloys in Contact with Copper, 35 

 consequently, 



for the pair of wires No. 1, =88*20 

 No. 2, =81-04 



Mean . . =86*12 



The quotient obtained by the division of the value obtained by 



M. Edlund (146-18) by this is 1*70. 



The values above obtained of the thermoelectric and electro- 



86*12 

 motive forces have the ratio ^^t^ =1*05. If this number be 



82-36 



1*70 



multiplied by the reduction-factor t-^1\ =1*07, the number 1*12 



is obtained, which is exactly equal to the numerical proportion 

 of the two forces determined by Professor Edlund. 



Copper-bismuth. 

 Electromotive Force. 



Experiment 6. 

 5 = tan 27° 35'. 



Experiment 7. 

 s= tan 12° 55'. 



Experiment 8. 

 s=tan6°45'. 



Deflections. 



Deflections. 



Deflections. 



173-25 

 172-70 

 172-70 



85-70 

 85-50 

 85-10 



47-85 

 4800 

 4805 



Mean... 172-88 



85-43 



47-97 



These experiments give /3 = 2*794 and 



a =439*33 from Exp. 6, 

 « = 398*95 „ 7, 



Mean 



« =413*14 

 a = 417*14 



8. 



Professor Edlund found a = 783*10. The ratio 



783-10 



= 1-88 



417-14 



is greater than that corresponding to the combination iron-cop- 

 per. Since it may be assumed that the molecular state of the 

 iron- copper wire is pretty constant, this signifies that the rod of 

 crystalline bismuth had undergone some molecular change since 

 its examination by Professor Edlund. This alteration had in- 

 duced a diminution of the electromotive force. 



The thermoelectric experiments gave the following result : — 



D2 



