THE MEASUREMENT OF RESISTANCE 219 



VARIATION OF 



'ELECTRICAL RESISTANCE OF PURE METALS 

 AND ALLOYS WITH TEMPERATURE 



DEWAR AND FLEMING 



45,000 



50,000 



45.000 



40.000 



35.000 



30.000 



25.000 



20.000 



15.000 



10.000 



5.000 

 4.000 

 3.000 

 2,000 

 1.000 



oO 



300" 250 200 150 100 50 50 100 150 200 

 Temperature in Platinum Degrees 



FIG. 125. Showing effect of temperature on electrical resistance. 



