,178 Effects of Strain on the ThermO'electric Qualities of Metals. 



Table XIIL— Manganin Wire. 

 Current from Stretched to Unstretclied. 



Temperature difference = 86°. Total resistance in circuit 

 = 30 ohms. 



Total -weight 

 in grammes. 



Percentage 

 temporary- 

 elongation. 



Percentage 

 permanent 

 elongation. 



Current in 

 mikroampere 

 per degree 

 with weight on. 



Thermo-electric 

 difference in 

 mikrovolt 

 per degree. 



250 







-001888 



-05665 



500 



0*-145 



-012 



0-002124 



-06372 



750 



0-260 



0-072 



-002090 



0-06272 



lOOO 



0-327 



0-120 



-002259 



-06778 



1250 



0-382 



0-151 



-002158 



-06474 



1500 



0-427 



0-166 



-002158 



-06474 



1750 



0-484 



193 



-002192 



-06575 



Table XIV.— Iron Wire. 



Current from Unstretched to Stretched. 



Temperature difference = 85°. Total resistance in circuit 

 = 19-20 ohms. 



Total weight 

 in grammes. 



Percentage 

 temporary 

 elongation. 



Percentage 

 permanent 

 elongation. 



Current in 

 mikroampere 



per degree 

 with weight on. 



Thermo-electric 

 difference in 

 mikroTolt 

 per degree. 



250 







-0000727 



0-000912 



500 







-000131 



0-006216 



750 



0*-b23 





-000131 



0-006216 



1000 



0-03 



o'-b2 



-003813 



-07192 



1250 



0-06 



0-027 



-007816 



-09485 



1500 



0-19 



0-08 



-007736 



-09430 



1750 



-39 



0-23 



-006602 



-08696 



2000 





3*41 



0-00461 



-07576 



