44 



ELECTROLYSIS. 



RELATIVE CONDUCTIVITY OF METALS. COMPARED TO SILVEB AND PURE 

 COPPER. (Lazare Weiller.) 



INFLUENCE OF THE TEMPERATURE ON THE RESISTANCE OF METALS. 



(Matthiessen.) 



According to the formula R = r (1 + a t + b t 2 }. 

 R resistance at t ; r resistance at 0; t centigrade degrees. 

 Value of numerical coefficients a and 6 for a few metals. 



