TABULAR DATA. 



45 



CONDUCTIVITY OP METALS (Matthiesson). 

 Coefficients for the temperature : t in degrees centigrade. 



Metals. 



Coefficients. 



Silver 

 Copper 



(J..1.1 .. 

 Zinc .. 

 ('ii'liiiium 

 Tin .. 



if 



Antimony, 

 Bismuth 



Average 



C = 100 

 C = 100 

 = 100 

 C = 100 

 C = 100 

 C = 100 

 = 100 

 C = 100 

 C = 100 

 C = 100 

 C = 100 



0-38278 i + 0- 

 0-38701 t + 

 0-36745 t + 

 0-37047 t + 

 0-36871 t + 

 0-30029 t + 

 ii-:;-7:>6< + 

 0-38996 t + 

 0-39826 t + 

 0-35216 t + 

 0- 37647 t + 



0009848 P 

 0009009 P 

 0008443 t* 

 0008274 t 2 

 0007575 t* 

 0006136 t* 

 0009146 P 

 0008879 P 

 0010364 P 

 0005728 P 

 0008340 P 



INFLUENCE OF TUB TEMPERATURE OK THE RESISTANCE AND THE CONDUCTIVITY 



OF PUBE COPPER. 



RESISTANCE OP ANNEALED PURE COPPEB WIRES AND BARS AT CENT. 



