610 



BRIDGMAN. 



TABLE XIII. 



Irox. 



s^Tiimetrical and parabolic, and is therefore sufficiently characterized 

 by the mean value in the table without graphical representation. 



Iron was the first substance on which I made measurements, and 

 many runs were made before the difficulties of temperature control 

 were overcome, or the best methods of manipulation discovered. ^ All 

 the earlier results agreed within their larger limits of error with the 

 final results. 



J 0,4^, 20° 4^ 60" 80= 100" 

 Temperature 



£.0.235 



20-' 40° 60° 80° 1 00° " ■ ■ 



Temperature 

 Iron 



Figure 15. Iron, results for the measured resistance. The Fdeviatious 

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

 the deviations are symmetrical about the mean pressure, there is no need of 

 giving the detailed curves. The pressure coefficient is the average coefficient 

 between and 12000 kg. 



