[james] COEFFICIENT OF EXPANSION OF MERCURY 57 



The following readings were obtained: — 



The weight at zero was taken as 1527-16 grams. Taking the 

 mean value, we find : 



Temp, range. Coefficient 

 uncorrected. 



Coefficient 

 corrected. 



-20 to 0°C. 

 -30 to 0°C. 

 -37 to 0°C. 



•00017962 

 000179389 

 ■000179005 



■00018059 

 00018030 

 ■00017988 



Comparing these results with those of other observers we shall 

 confine ourselves to those of Callendar and Moss, by Dulong and Petit's 

 method, and those of Callendar and Harlow, by the quartz dilatometer. 

 The following table gives these values: 



