586 



BRIDGMAN. 

 TABLE I. 



Indium. 



Pressure, Kg. /Cm.' X lO'^ 



Figure 3. Indium, results for the measured resistance. The deviations 

 from linearity are given as fractions of the resistance at kg. and 0°C. The 

 pressure coefficient is the average coefficient between and 12000 kg. 



The average temperature coefficient found above, extrapolated for 

 the range 0° to 100°, is 0.00407. This is considerably lower than the 

 only other value I have been able to find, 0.00474 by Erhard.^ 



The general character of the results for indium is as follows. The 

 average pressure coefficient of resistance increases linearly with tem- 

 perature, but the increase is less than one third as much as the increase 

 of resistance. The departure from linearity, on the other hand, 

 increases at higher temperatures more rapidlj^ than the initial resist- 

 ance. This means that if resistance is plotted as ordinates against 

 pressure for each of several temperatures and then if the scale of the 



9 T. Erhard, Wied. Ann. 14, 504 (1881). 



