206 



BRIDGMAN. 



changes of volume directly from the original data at intervals of 1000 

 kg. In the following table is given the changes of volume at even 

 1000 intervals at the mean temperature of 45°, obtained by taking 



TABLE III. 



Volume Changes of Potassium under Changes of Pressure and 



Temperature. 



the mean of the two series of measurements at 30° and 60°, and there 

 is also shown the mean thermal expansion over this range, obtained by 

 dividing the smoothed observed expansion over the range from 30° to 

 60° by 30. The tabulated changes of volume and the expansion are 

 those of a mass of potassium that occupies 1 c.c. at 20° at atmospheric 



