90 



BRIDGMAN. 



TABLE VI. 



Magnesium. 



3.2 



S > 



a D 



.0025 



.0015 



o 



.0.410 



.0.405 



S .0,400 



40" 60' 

 Temperature 



2 4 6 8 



Pressure. Kg. / Cm." X 10' 



Magnesium 



Figure 6. Results for the measured resistance of magnesium. 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. 



in the same way as the results of the previous paper. The average 

 pressure coefficient decreased with rising temperature, which is 

 unusual. The relation between resistance and pressure departs from 

 linearity in the usual direction, but it is unusual that the relation is 

 more nearly linear at 50° than at either 0° or 100°. The pressure of 

 maximum departure from linearity moA'es progressi\'ely towards 

 lower A'alues at higher temperatures. 



It is interesting to compare these values with those found for the 

 first and presumably less pure sample. The temperature coefficient 

 of the fust sample was 0.00412, against 0.00390 for the second, and 



