Strain mi the Thermo-electric Qualities of Metals. VI $ 



Table VL — Commercial Copper Wire. 



Current from Stretched to Unstretched. 



Temperature difference = 88° C. Total resistance in circuit 

 = 16-66 ohms. 



Total weight 

 in grammes. 



Percentage 

 temporary 

 elongation. 



Percentage 

 permanent 

 elongation. 



Current in 

 mikroampere 

 per degree 

 with weight on. 



Thermo-electric 

 difference in 

 mikroYolt 

 per degree. 



250 



0-05 





0-00119 



0-02 



500 



0-1 





-00142 



•023r> 



750 



0-14 





-00138 



-0231 



1000 



0-19 





0-00148 



-0247 



1250 



0-23 



o'-()24 



-00152 



-0253 



1500 



0-28 



0-058 



-00161 



-0269 



1750 



a-32 



0-083 



0-00175 



-0291 



2000 



0-37 



0-112 



-00191 



-0318 



Table VIL— Copper for Alloy. 

 Current from Stretched to Unstretched. 



Temperature difference = 87° C. Total resistance in circuit 

 = 15-62 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 



0-08 





-000333 



0-00521 



500 



0-145 



0-041 



-000533 



-00833 



750 



0-176 



059 



-000600 



-00937 



1000 



0-215 



0-076 



-000833 



-01302 



1250 



0-256 



0-105 



-001167 



-01823 



1500 



0-285 



0-118 



-001324 



-02031 



1750 



0-340 



0-142 



0-001433 



-02239 



2000 



0-402 



0-170 



-001600 



-02500 



