FAILUKE OF OHM S LAW AT HIGH CURRENT DENSITIES. 



163 



are much more irregular, and the Hmits of error are greater for the 

 thicker than the thinner gold. The extrapolation is more uncertain 

 because perceptible curvature continues to higher frequencies than for 

 the thinner gold. It was not possible to reach such high current densi- 



FiGURE 10. Collected results for gold 8 X lO"" cm. thick. Abscissae, current 

 density in 10" amp/cm^ ordinates, extrapolated difference between A.C. and 

 D.C. resistance in per cent of D.C. resistance. The numbers in the body^of 

 the diagram show the breadth of the various samples in mm. 



1.2 3 



Figure 11. Collected results for gold 1.67X10~5 cm. thick. Abscissae, 

 current density in 10" amp/cm-; ordinates, extrapolated difference between 

 A.C. and D.C. resistance in per cent of D.C. resistance. The numbers in 

 the body of the diagram show the breadth of the various samples in mm. 



